Red Hat Linux Security Advisories & Vulnerabilities
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Latest Red Hat advisories
High [CVE-2026-58014] off-by-one error in glib/gkeyfile.c via "g_key_file_get_locale_string_list"
A flaw was found in GLib. An off-by-one error can occur in the g_key_file_get_locale_string_list function in the gkeyfile.c file when loading a key file with an empty value. This flaw can cause an out-of-bounds access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundary. Any applications loading or parsing untrusted key files, typically.desktop or.ini files, are vulnerable to this issue. Due to these reasons, this vulnerability has been rated with a moderate severity. Red Hat severity: Moderate — CVSS 7.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). Weakness: CWE-193. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 32 more. Affected products named by the advisory: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; and 28 more.
High [CVE-2026-58374] Denial of Service via malformed Wi-Fi 7 Multi-Link Operation association request
In hostapd before 2.12, a missing bounds check in AP-mode Wi-Fi 7 (IEEE 802.11be) Multi-Link Operation (MLO) association request processing allows an unauthenticated attacker within wireless range to send a crafted management frame containing a malformed Multi-Link Element or Per-STA Profile subelement. In hostapd_process_ml_assoc_req() in src/ap/ieee802_11_eht.c, the received link_id field can be parsed as value 15, but the corresponding links[] storage only has valid entries for lower link IDs (0 through 14). This causes an out-of-bounds write / small memory corruption during association processing before the 4-way handshake. The attack does not require network credentials, prior authentication, or user interaction. The confirmed practical impact is denial of service through hostapd process termination. This affects hostapd v2.11 and newer development snapshots before v2.12 when built with CONFIG_IEEE80211BE enabled. The issue is fixed in hostapd v2.12 and the upstream 2026-1 fixes. A flaw was found in hostapd. Red Hat severity: Moderate — CVSS 7.1 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H). Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8. Red Hat fixing advisory: RHSA-2026:85276, RHSA-2026:85277. Affected products named by the advisory: Red Hat package: hostapd.
High [CVE-2026-53433] Denial of Service via inefficient HTTP body processing
fzf is vulnerable to a Denial of Service (DoS) due to inefficient HTTP body processing in the --listen mode due to inefficient HTTP body processing using repeated string concatenation, resulting in quadratic time complexity (O(n²)). A crafted POST request with many small segments can trigger excessive CPU usage during request handling. This allows a single malicious request to monopolize the single‑threaded HTTP server, blocking all other clients and resulting in denial of service. This issue was fixed in version 0.73.1. A flaw was found in fzf, a command-line fuzzy finder. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by sending a crafted POST request with many small segments to the `--listen` mode. The inefficient HTTP body processing, which uses repeated string concatenation, leads to quadratic time complexity, causing excessive CPU usage and blocking other clients. Red Hat has corrected the impact from IMPORTANT to MODERATE — the original AI-Bot CVSS of 7.5 (AV:N/AC:L) did not account for the --listen mode being a non-default feature that must be explicitly enabled. The CVEORG CVSSv4 score of 5.7 (AV:L/AT:P) more accurately reflects the prerequisite nature of the attack. Weakness: CWE-1046.
High [CVE-2026-49434] Unauthorized broker instantiation via improper input validation in LDAP entries
Improper Input Validation vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All. An attacker that has access to publish or modify entries in LDAP that match the configured searchBase and searchFilter can instantiate denied transports inside the broker JVM. This can be used to fetch an attacker URL and spawn a second BrokerService inside the same JVM. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue. An attacker with privileges to publish or modify entries in Lightweight Directory Access Protocol (LDAP) can exploit an improper input validation vulnerability. Red Hat products ship Apache ActiveMQ Classic components as transitive dependencies. The vulnerability is in the LdapNetworkConnector feature specific to Classic ActiveMQ, which allows an attacker with LDAP write access to instantiate denied transports and spawn a rogue broker. This feature is not configured or used in any Red Hat product deployment. Red Hat AMQ Broker is based on Apache ActiveMQ Artemis, a separate codebase that does not include the LdapNetworkConnector. Red Hat severity: Important — CVSS 7.6 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H). Weakness: CWE-90. Affected products named by the advisory: Red Hat AMQ Broker 7; Red Hat AMQ Clients; Red Hat build of Apache Camel for Spring Boot 4; Red Hat Data Grid 8; and 7 more.
High [CVE-2026-49432] Denial of Service via improper input validation in STOMP connector
Improper Input Validation vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp. A remote unauthenticated peer that can reach an exposed STOMP connector can trigger denial-of-service behavior by sending a negative content-length. For the NIO STOMP transport, an attacker can keep streaming body bytes and grow the per-connection command buffer beyond configured limits to cause OOM. For the blocking STOMP protocol, an error will instead force abnormal transport exception handling for the affected connection and closure. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue. This can lead to a denial of service (DoS) condition, either by consuming excessive memory and causing an Out-Of-Memory (OOM) error or by forcing the abnormal closure of affected connections. Red Hat products ship Apache ActiveMQ Classic components as transitive dependencies. The vulnerability is in the Classic ActiveMQ STOMP connector's content-length validation, allowing an unauthenticated attacker to cause OOM via a negative content-length value. Apache ActiveMQ Artemis, which powers Red Hat AMQ Broker, has its own STOMP protocol implementation (artemis-stomp-protocol) that does not share this code path. The Classic STOMP connector is not exposed in Red Hat product deployments.
High [CVE-2026-50734] Denial of Service via crafted WireFormatInfo frame
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All. An unauthenticated network attacker can cause a broker DoS by sending a crafted WireFormatInfo frame with a malicious large size value. The value is not validate and causes the broker to attempt allocation during pre-auth negotiation which can trigger OOM and crash the broker. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue. Consequently, this can lead to an Out Of Memory (OOM) error, resulting in a Denial of Service (DoS) and crashing the broker. A flaw was found in Apache ActiveMQ Classic's OpenWire protocol handling. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-770. Affected Red Hat products: AMQ Clients 2026.Q3; Red Hat AMQ Broker 7.13.6; Red Hat AMQ Broker 7.14.1; Red Hat AMQ Broker 7; Red Hat AMQ Clients; Red Hat Fuse 7; Red Hat Single Sign-On 7. Red Hat lists Red Hat build of Apache Camel for Spring Boot 4; Red Hat Data Grid 8; Red Hat Enterprise Linux 8; Red Hat JBoss Enterprise Application Platform 7; Red Hat JBoss Enterprise Application Platform 8; Red Hat Satellite 6 as not affected. Will not fix / out of support: Red Hat Fuse 7; Red Hat Single Sign-On 7. Red Hat fixing advisory: RHSA-2026:69459, RHSA-2026:66545, RHSA-2026:66488.
High [CVE-2026-50750] Denial of Service via repeated BrokerInfo commands
Denial of Service via Out of Memory vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All. Following the fix for CVE-2026-49270 an unauthenticated attacker can now cause broker OOM by sending an repeated BrokerInfo commands without sending a ConnectionInfo, until the broker will crash with OOM. Users are recommended to upgrade to version 6.2.7, which fixes the issue. This can lead to an Out of Memory condition, causing the broker to crash and resulting in a Denial of Service. Red Hat products that include Apache ActiveMQ classic components ship versions prior to 5.19.7 (5.x line) and prior to 6.2.6 (6.x line). The vulnerable code was introduced as a regression in versions 5.19.7 and 6.2.6 while fixing CVE-2026-49270, and is not present in the versions shipped by Red Hat. Products shipping Apache ActiveMQ Artemis are not affected as Artemis is a separate codebase. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-770. Red Hat lists Red Hat AMQ Broker 7; Red Hat AMQ Clients; Red Hat build of Apache Camel for Spring Boot 4; Red Hat Data Grid 8; Red Hat Enterprise Linux 8; Red Hat Fuse 7; Red Hat JBoss Enterprise Application Platform 7; Red Hat JBoss Enterprise Application Platform 8; Red Hat Satellite 6; Red Hat Single Sign-On 7 as not affected.
High [CVE-2026-53916] Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: Unbounded header buffer in STOMP NIO codec
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp. An unauthenticated client that opens a STOMP NIO connection can send header bytes that never terminate which makes the broker buffer them without limit, exhausting the JVM heap. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue. An unbounded memory allocation flaw was found in the STOMP NIO codec of Apache ActiveMQ Classic. This affects Apache ActiveMQ Classic before 5.19.8 and versions 6.0.0 before 6.2.7, including the activemq-stomp and activemq-all artifacts. Red Hat products ship Apache ActiveMQ Classic components as transitive dependencies. Apache ActiveMQ Artemis, which powers Red Hat AMQ Broker, has its own STOMP protocol implementation (artemis-stomp-protocol) that does not share this code path. The Classic STOMP NIO codec is not exposed in Red Hat product deployments. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-789. Affected Red Hat products: Red Hat AMQ Broker 7.13.6; Red Hat AMQ Broker 7.14.1; Red Hat Fuse 7. Will not fix / out of support: Red Hat Fuse 7. Red Hat fixing advisory: RHSA-2026:66545, RHSA-2026:66488.
High [CVE-2026-54475] Information disclosure due to broken temporary destination isolation
Missing Authorization vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ. Apache ActiveMQ Classic temporary destinations are expected to be isolated to the connection that created them. The isolation can be broken as this is only checked in the client, allowing a different connection to consume from another connection's temporary destination. Users are recommended to upgrade to version 6.2.7, which fixes the issue. Temporary destinations, which are designed to be private to a specific connection, can be accessed by other connections due to a missing authorization check. This allows an unauthorized connection to consume messages from another connection's temporary destination, leading to information disclosure. Red Hat products ship Apache ActiveMQ Classic components as transitive dependencies. Red Hat AMQ Broker is based on Apache ActiveMQ Artemis, which has its own temporary destination implementation. The Classic broker's temporary destination logic is not exercised at runtime in Red Hat product deployments. Red Hat severity: Important — CVSS 8.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L). Weakness: CWE-1220. Affected Red Hat products: Red Hat Fuse 7. Red Hat lists Red Hat AMQ Broker 7; Red Hat Data Grid 8; Red Hat Enterprise Linux 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected.
High [CVE-2026-13149] Denial of Service due to exponential-time complexity
brace-expansion through 5.0.6 is vulnerable to denial of service. The expand() function exhibits exponential-time complexity in the number of consecutive non-expanding '{}' brace groups. An attacker who passes a crafted string to expand(), directly or transitively, can cause significant CPU consumption and event-loop blocking. The max option does not mitigate this, as it bounds the output size rather than the recursion work. An attacker can exploit a vulnerability in the `expand()` function by providing a specially crafted string. This can result in a Denial of Service (DoS) for the affected system. A flaw was found in brace-expansion, a widely-used npm package for expanding brace sequences. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-1333. Affected products named by the advisory: Cryostat 4 on RHEL 9; Red Hat AMQ Broker 7.13.6; Red Hat AMQ Broker 7.14.1; Red Hat Enterprise Linux 10.0 Extended Update Support; and 47 more. Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Advanced Cluster Security 4.9; Red Hat Advanced Cluster Security for Kubernetes 4.10; and 43 more.
High [CVE-2026-45822] Denial of Service via crafted input
decode-uri-component through 0.4.1 is vulnerable to denial of service. The decode() function splits input on '%' producing N tokens and calls decodeComponents(), exhibiting super-linear parsing time: 200 '%ab' tokens takes approximately 0.7s, 700 tokens approximately 6s, and 1400 tokens approximately 33s. An attacker can cause significant CPU consumption and event-loop blocking via crafted input. A flaw was found in the `decode-uri-component` library. This vulnerability allows a remote attacker to trigger a Denial of Service (DoS) by submitting specially crafted input. The `decode()` function, when processing a large number of encoded URI components, consumes excessive CPU resources, which can lead to the application becoming unresponsive and unavailable. In Red Hat products where this package is bundled (OpenShift Console, Quay, Pipelines, RHOAI, and others), exploitation requires that attacker-controlled input containing crafted percent-encoded strings reaches the decode() function without prior length validation. Red Hat rates this as Moderate severity since the impact is limited to availability with no confidentiality or integrity impact, consistent with the CNA's CVSS 4.0 assessment of 6.6 Medium. Weakness: CWE-1050. Affected products named by the advisory: Red Hat Migration Toolkit 1.8; Red Hat Quay 3.10; Red Hat Quay 3.12; Red Hat Quay 3.15; and 7 more.
High [CVE-2026-12243] Information disclosure via path traversal vulnerability
NLTK version 3.9.4 is vulnerable to a path traversal attack due to an incomplete fix for GitHub Issue #3504. The `_UNSAFE_NO_PROTOCOL_RE` regex in `nltk/data.py` checks for literal `../` sequences but fails to account for percent-encoded traversal sequences such as `..%2f`. The `url2pathname()` function decodes these sequences after the validation step, allowing an attacker to bypass the protection. This vulnerability enables an attacker to read arbitrary files accessible to the Python process by controlling the resource name parameter passed to `nltk.data.load()` or `nltk.data.find()`. The issue affects applications that rely on NLTK for resource loading, including NLP web applications, Jupyter notebooks, and CLI tools. The default `pathsec.ENFORCE=False` setting exacerbates the impact by not blocking the file read at the `open()` stage. A flaw was found in NLTK. An attacker can exploit a path traversal vulnerability by providing specially crafted input to `nltk.data.load()` or `nltk.data.find()`. The vulnerability allows arbitrary file reads when an attacker can control the resource_name parameter by using percent-encoded path separators to bypass validation. In Red Hat products where NLTK is bundled (OpenShift AI, OpenShift Lightspeed, Ansible Automation Platform), the resource loading functions are typically used internally to load pre-packaged NLP models and corpora.
Medium [CVE-2026-54902] Use-After-Free in Oj::Parser SAJ Long Key Callback
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, is vulnerable to Use-After-Free when in SAJ mode. The Oj::Parser does not protect cached object keys (≥ 35 bytes) from garbage collection, and a Ruby callback that triggers GC inside hash_end can cause the key string to be reclaimed while the C parser still holds a pointer to it. The subsequent access to the freed string VALUE results in a segfault, confirmed by an RIP pointing to address 0x4242 (a canary-style pattern suggesting control over the freed memory's content). This issue has been fixed in version 3.17.2. Red Hat's only product shipping the Oj Ruby gem (Compliance Backend) already includes version 3.17.3, which contains the fix for this vulnerability. No Red Hat products are affected. Red Hat severity: Moderate.
Medium [CVE-2026-54901] Use-After-Free in Oj::Parser array_class/hash_class GC Marking
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj::Parser in usual mode does not mark array_class and hash_class references during garbage collection, leading to Use-After-Free. If GC runs after the class is assigned but before a parse, the class object is reclaimed, leaving the parser holding a dangling VALUE. The subsequent parse call dereferences the freed object, producing a segfault. This issue has been fixed in version 3.17.2. Red Hat's only product shipping the Oj Ruby gem (Compliance Backend) already includes version 3.17.3, which contains the fix for this vulnerability. No Red Hat products are affected. Red Hat severity: Moderate.
Medium [CVE-2026-54898] Denial of Service via input string mutation during JSON parsing
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2,Oj::Parser#parse is vulnerable to a heap use-after-free when a SAJ/SAJ2 callback mutates the input JSON string during parsing. The C engine holds a raw const byte * pointer into the Ruby string's internal buffer. If a callback (e.g. hash_start) resizes the string — for example by calling String#replace with a longer value — Ruby reallocates the string buffer and frees the old one. The C parser's pointer is left dangling; the next character read at parser.c:607 is a use-after-free. This issue has been fixed in version 3.17.2. A flaw was found in Oj, a Ruby library designed for efficient JSON (JavaScript Object Notation) parsing. This action can lead to the program attempting to access memory that has already been freed, potentially causing the application to crash and resulting in a denial of service. Red Hat's only product shipping the Oj Ruby gem (Compliance Backend) already includes version 3.17.3, which contains the fix for this vulnerability. No Red Hat products are affected. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-825.
Medium [CVE-2026-54502] Stack Buffer Overflow in Oj.dump via Large Indent
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj.dump is vulnerable to a stack-based buffer overflow when a large:indent value is provided by the developer. fill_indent in dump.h calls memset(indent_str, ' ', (size_t)opts->indent) without validating the size. When opts->indent is set to INT_MAX (2,147,483,647), the (size_t) cast preserves the large value and memset writes 2 GB into the stack-allocated out buffer (4,184 bytes), corrupting the stack and crashing the process. This issue has been fixed in version 3.17.2. Red Hat's only product shipping the Oj Ruby gem (Compliance Backend) already includes version 3.17.3, which contains the fix for this vulnerability. No Red Hat products are affected. Red Hat severity: Moderate.
Medium [CVE-2026-54500] Information disclosure via uninitialized stack memory read
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.3, Oj.load in:object mode reads uninitialized stack memory (and, for long keys, reads out of bounds) when parsing a JSON object whose key is 254 bytes or longer. The interned bytes can surface to the caller, disclosing process stack memory. In ext/oj/intern.c, form_attr() handles the long-key path by allocating a heap buffer, `b`, populating it with the attribute name, and then freeing it — but it passed the uninitialized stack buffer buf (not b) to rb_intern3(). rb_intern3 therefore reads len + 1 bytes of uninitialized stack memory. When the key length is >= 256, it also reads out of bounds past the 256-byte buf. This issue has been fixed in version 3.17.3. This vulnerability, an out-of-bounds read (CWE-125), can lead to information disclosure of process stack memory. The leaked information is uncontrolled and can only be accessed if the application exposes the resulting Symbol or an EncodingError. Red Hat's only product shipping the Oj Ruby gem (Compliance Backend) already includes version 3.17.3, which contains the fix for this vulnerability. No Red Hat products are affected. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N). Weakness: CWE-125.
Medium [CVE-2026-54899] Use-After-Free in parser symbol key cache toggle
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, disabling symbol_keys on a reused Oj::Parser instance triggers a heap use-after-free. When symbol_keys is toggled from true to false, opt_symbol_keys_set frees the internal key cache (cache_free) but does not clear the pointer. The next parse call reads from the freed cache via cache_intern, producing a use-after-free. This issue has been fixed in version 3.17.2. A flaw was found in Oj (Optimized JSON), a Ruby gem for parsing JSON. This happens because the internal key cache is freed but its pointer is not cleared, allowing subsequent parse operations to read from freed memory. This can lead to unpredictable application behavior, crashes, or potentially arbitrary code execution. Red Hat's only product shipping the Oj Ruby gem (Compliance Backend) already includes version 3.17.3, which contains the fix for this vulnerability. No Red Hat products are affected. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H). Weakness: CWE-825.
Medium [CVE-2026-54673] Information disclosure via unstripped credential headers during HTTP redirects
electron-updater allows for automatic updates for Electron apps. Prior to 9.7.0, the HTTP redirect handler (HttpExecutor.prepareRedirectUrlOptions) only stripped a credential header whose key string matched exactly lowercase "authorization", exposing credentials. Other credential-bearing headers — most notably PRIVATE-TOKEN (used by GitLab's personal access token flow) and mixed-case Authorization (used by GitLab's Bearer/OAuth flow) — were not stripped and could be forwarded to an attacker-controlled cross-origin redirect destination. This issue has been fixed in version 9.7.0. This vulnerability allows a remote attacker to obtain sensitive user credentials. When an Electron application performs an HTTP redirect, the electron-updater's redirect handler fails to strip certain credential-bearing headers, such as PRIVATE-TOKEN or mixed-case Authorization headers. This oversight can lead to these credentials being forwarded to an attacker-controlled destination, resulting in information disclosure. This could allow an attacker who controls a redirect destination to capture authentication credentials used during application update checks. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). Weakness: CWE-201. Affected Red Hat products: Red Hat Build of Podman Desktop; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9.
Medium [CVE-2026-57204] Denial of Service via crafted PDF with missing stream length
pypdf is a free and open-source pure-python PDF library. Prior to 6.13.3, a maliciously crafted PDF can cause DoS. An attacker who uses this vulnerability can craft a PDF which leads to large memory usage, as MAX_DECLARED_STREAM_LENGTH is sometimes ignored. This requires parsing a content stream without a /Length value. This issue has been fixed in version 6.13.3. A remote attacker could exploit this vulnerability by crafting a malicious PDF file that, when parsed, leads to uncontrolled resource consumption and large memory usage. This occurs because the library sometimes ignores defined limits for stream lengths when a content stream lacks a /Length value. Successful exploitation could result in a Denial of Service (DoS) condition, making the system or application unavailable. This Moderate flaw in pypdf can lead to a Denial of Service (DoS) due to uncontrolled memory consumption when processing a specially crafted PDF file. The vulnerability arises from the library's failure to properly enforce stream length limits in certain scenarios, allowing an attacker to exhaust system resources. Red Hat products that process untrusted PDF content, such as Red Hat Enterprise Linux AI, Red Hat Quay, Red Hat Ansible Automation Platform, and OpenShift Lightspeed, are affected if they handle untrusted PDF inputs.
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