Red Hat Linux Security Advisories & CVEs
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Latest Red Hat advisories
Medium [CVE-2026-81893] invalid write in JPEG ICC profile parser on error recovery
A flaw was found in gdk-pixbuf. When loading a specially crafted JPEG image containing chunked ICC profile markers, an error during ICC profile parsing can leave stale size metadata after the profile buffer is freed. A subsequent allocation in the same decode can cause an out-of-bounds write, potentially crashing the application. Affected version >= 2.26.4 Red Hat Product Security has rated this issue as having Moderate security impact. Red Hat severity: Moderate — CVSS 4.7 (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: gdk-pixbuf2.
Medium [CVE-2026-59276] org.springframework.security/spring-security-core: Spring Security: Information disclosure via timing attack in sensitive value comparison
Several components in Spring Security compare security-sensitive values using standard string equality (String.equals()) rather than a constant-time comparison. Because String.equals() returns as soon as it finds a differing character, the time taken to reject an incorrect value is proportional to the number of leading characters that match the expected value. An attacker capable of submitting a very large number of guesses and precisely measuring response latency could, in principle, use these timing differences to recover the expected value one character at a time. Because rejection time can correlate with how many leading characters match, an attacker who can submit a very large number of requests and precisely measure response latency could, in theory, recover protected values incrementally, leading to information disclosure. Practical exploitation is difficult due to network variability and the volume of measurements required. Red Hat products that ship an affected version of Spring Security are affected. Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-208. Affected Red Hat products: OpenShift Developer Tools and Services; Red Hat Fuse 7; Red Hat OpenShift Dev Spaces; Red Hat Single Sign-On 7. Will not fix / out of support: OpenShift Developer Tools and Services; Red Hat Fuse 7; Red Hat Single Sign-On 7.
Medium [CVE-2026-59272] Information disclosure due to disabled TLS hostname verification
Any application shipping logs to RabbitMQ over TLS via the Log4j2 appender, relying on the documented default, is exposed to man-in-the-middle interception of every log event. Spring AMQP 4.1.0 Spring AMQP 4.0.0 - 4.0.4 Spring AMQP 3.2.0 - 3.2.12 Spring AMQP 2.4.18 and earlier When configured to ship logs to RabbitMQ over Transport Layer Security (TLS), the appender disables hostname verification by default. This misconfiguration allows a remote attacker to perform a man-in-the-middle (MITM) attack, intercepting sensitive log events. This can lead to unauthorized information disclosure. This vulnerability affects the Log4j2 AmqpAppender, a non-default, opt-in component that routes log events to a RabbitMQ broker over AMQP. No Red Hat product enables this appender by default — it requires explicit configuration by the application deployer, making exposure conditional on a deliberate architectural choice. For Red Hat Enterprise Linux, resteasy packages in RHEL 8 bundle log4j-core as a build-time dependency but do not activate or expose the AMQP Appender at runtime. PKI deployments are not affected unless a custom Log4j2 configuration independently enables the appender. Exploitation requires the attacker to already hold a man-in-the-middle position on the network path between the logging client and the RabbitMQ broker.
Medium [CVE-2026-81725] Regular Expression Denial of Service via malformed TEI blocks
NLTK before 3.10.3 contains a regular expression denial of service vulnerability in Pl196xCorpusReader that allows attackers to cause quadratic CPU consumption by supplying malformed TEI blocks with many unmatched opening tags. Attackers can exploit lazy regex patterns in the read_block method through public APIs like words() and tagged_words() to force repeated rescans and achieve near-quadratic runtime growth. A flaw was found in NLTK, specifically within the Pl196xCorpusReader component. A remote attacker can exploit this by supplying malformed Text Encoding Initiative (TEI) blocks containing numerous unmatched opening tags. This impact flaw in NLTK's Pl196xCorpusReader can lead to a denial of service. When processing specially crafted TEI blocks containing many unmatched opening tags, the library's regular expression engine can consume excessive CPU resources. This vulnerability primarily affects applications that process untrusted TEI data using NLTK's text processing APIs, potentially impacting service availability. Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-1333. Affected Red Hat products: Exploit Intelligence; Lightspeed Core; OpenShift Lightspeed; Red Hat Ansible Automation Platform 2; Red Hat OpenShift AI (RHOAI). Red Hat lists OpenShift Lightspeed as not affected.
Medium [CVE-2026-81723] Denial of Service via malformed XML corpus files
NLTK versions before 3.10.3 contain a quadratic CPU exhaustion vulnerability in XMLCorpusView._read_xml_fragment() that rescans accumulated XML fragments on every 1 KiB block read. Attackers can provide malformed XML corpus files to cause severe CPU consumption and denial of service through affected readers like BNCCorpusReader. A flaw was found in NLTK. The flaw occurs because the system repeatedly rescans accumulated XML fragments, leading to quadratic CPU exhaustion. This vulnerability in NLTK arises from a quadratic CPU exhaustion when processing specially crafted XML corpus files. While the flaw can lead to a denial of service, its impact is limited to scenarios where NLTK-based applications in Red Hat products, such as those within OpenShift AI and Lightspeed Core, are configured to process untrusted XML data. Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-776. Affected Red Hat products: Exploit Intelligence; Lightspeed Core; OpenShift Lightspeed; Red Hat Ansible Automation Platform 2; Red Hat OpenShift AI (RHOAI). Will not fix / out of support: Exploit Intelligence; Red Hat Ansible Automation Platform 2. Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-81092] DNS Rebinding vulnerability due to missing Host header validation
mcp-go accepted requests on its HTTP transports without checking the Host header. StreamableHTTPServer. ServeHTTP in server/streamable_http.go and SSEServer. ServeHTTP in server/sse.go served any request arriving over a loopback connection regardless of the host it named, and the SSE transport's cross-origin default allowed any origin. A page in a browser could therefore point a name it controlled at the loopback address and reach a server listening there, invoking tools and reading resources that the server exposed on the assumption that only local software could connect. No release before 0.56.0 validated the header on either transport; 0.56.0 adds server/http_localhost.go, which rejects a loopback-bound request carrying a host that is not a loopback name, and wires it into both transports. A flaw was found in mcp-go. A remote attacker could exploit this by using a crafted web page to perform a DNS rebinding attack. This allows the attacker to direct a controlled domain name to the loopback address, bypassing local network restrictions. Consequently, the attacker could access and interact with local services and resources, potentially leading to information disclosure or unauthorized actions. DNS rebinding requires a web browser executing JavaScript to run on the same host as the mcp-go HTTP server, with the user visiting a malicious page during that window.
Medium [CVE-2026-80213] Resolv gem: DNS allowlist and egress bypass, and cache poisoning via crafted hostnames
An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::MessageEncoder wrote a DNS label's length into a single octet without checking its range. A label longer than 255 octets had its length stored modulo 256 but the label data was written unchanged, and thus the bytes on the wire described a different name than the one the application asked to encode. RFC 1035 section 2.3.4 limits a label to 63 octets, and the two high bits of the length octet are reserved for compression pointers. put_string packed the length with put_pack("C", d.length) and put_label used it for labels, and thus any value from 0 to 255 could end up as a label length octet, including the reserved 0x40-0xBF range and the 0xC0-0xFF pointer range. Resolv::DNS::Name.create did not check per-label or total name length either, and thus an attacker-controlled hostname reached the encoder unchanged. An application that resolves an attacker-controlled hostname sends a query whose wire bytes name a domain the attacker chose. A hostname suffix that the application validates against an allowlist becomes padding that never appears on the wire, and thus allowlist and egress checks can be bypassed. The recursive resolver caches the response under the attacker's name, and DNS logs record that name rather than the one the application asked for.
Medium [CVE-2026-81668] Cross-tenant Content View Filter rule access and modification via unauthorized parent filter lookup
A flaw was found in Katello where the Content View Filter Rules API does not properly enforce authorization on the parent Content View Filter. An authenticated, low-privileged user with Content View permissions in one organization may be able to access and modify filter rules belonging to a Content View Filter in another organization by supplying that filter's identifier. This can result in unauthorized disclosure of filter-rule information and unauthorized changes to unpublished Content View filter configuration. Red Hat Product Security has assessed this issue as a Moderate severity vulnerability. The issue arises because the API loads the parent Content View Filter by identifier without an authorization-aware scope. Successful exploitation allows the attacker to read filter-rule metadata and to add, change, or delete rules outside their authorized organization. Those changes persist in the live filter configuration and can affect the content included in a subsequent Content View publication. Already-published Content View versions are immutable snapshots and are not modified by this flaw. Confidentiality is Low because the disclosed data is filter-rule metadata rather than repository contents or credentials. Affected product named by the advisory: Red Hat Satellite 6.
Medium [CVE-2026-81658] Cross-tenant disclosure of template revisions via unauthorized audit lookup
A flaw was found in Foreman. The template revision endpoint does not enforce object-level authorization when retrieving an audited template revision. An authenticated, low privileged user with a template-related permission, such as view_ptables, can obtain historical template contents belonging to another organization or location by supplying the corresponding audit ID. This can result in unauthorized disclosure of historical template contents, which may contain sensitive configuration information, credentials, or other secrets. The REST API revision endpoints correctly restrict this lookup. Red Hat Product Security has rated this flaw as having a Moderate impact. This vulnerability affects Foreman's template revision handling. The vulnerability permits an authenticated, low-privileged user with limited template permissions to bypass organization and location authorization boundaries and access historical template revisions outside their authorized scope. This issue requires network access to the Foreman web interface and a valid account with a template-related permission such as view_ptables. No special attack conditions and no user interaction are required. The confidentiality impact is High because a successful request returns the full historical template body, which can include credentials or other secrets. Affected product named by the advisory: Red Hat Satellite 6.
Medium [CVE-2026-80489] Non-progress DoS in EUC_JISX0213 -> UCS-4 conversion state
Converting crafted EUC_JISX0213 input to UCS-4 or the internal wide character encoding, for example with iconv, in the GNU C Library version 2.3 to 2.44 may result in the converter making no progress, causing the calling application to hang. Some EUC_JISX0213 sequences decode to two code points. If the output buffer has room for only the first one, the converter stores the second in the conversion state and returns E2BIG, but it never clears that pending character after emitting it on the next call. The converter then keeps emitting the pending character without consuming further input, so an application that retries the conversion loops forever. The input must be attacker controlled and the application must convert it with an output buffer small enough to split the two code points. Only the EUC_JISX0213 character set is affected, which is not commonly used. The related defect in SHIFT_JISX0213 converter is tracked separately as CVE-2026-77117. A flaw was found in glibc. Impact is limited to process hang (availability only). Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-835. Affected Red Hat products: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.
Medium [CVE-2026-47892] Header Predicate Bypass in WebFlux Functional Endpoints
Header Predicate Bypass in WebFlux Functional Endpoints. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-807. Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Fuse 7; Red Hat OpenShift Dev Spaces; and 1 more. Affected products named by the advisory: Red Hat package: resteasy.
Medium [CVE-2026-47887] Open redirect vulnerability in UrlFileNameViewController
A Spring MVC application that uses UrlFileNameViewController that is mapped with an end-of-path, and does not have a configured prefix is vulnerable to an open redirect. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring Framework 6.0.0 - 6.0.30 Spring Framework 5.3.0 - 5.3.49 Spring Framework 5.2.25.RELEASE and earlier This could allow an attacker to redirect users to arbitrary malicious websites, potentially leading to phishing attacks or other social engineering exploits. An unauthenticated remote attacker can exploit this by enticing a user to follow a specially crafted URL, leading to an external redirection to an arbitrary domain. Because redirection occurs entirely within the context of browser navigation and application-level routing, default system isolation mechanisms like SELinux or non-root container boundaries do not mitigate the flaw. Technical impact is limited to phishing and user redirection without direct impact to server integrity or confidentiality. Red Hat severity: Moderate — CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N). Weakness: CWE-601. Affected Red Hat products: Red Hat build of Apache Camel - HawtIO 4; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Fuse 7; Red Hat OpenShift Dev Spaces. Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-38350] Integer overflow leads to Denial of Service
An integer overflow in the target_sws_fuzzer() function (libswscale/output.c) of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input. A flaw was found in FFmpeg. This can lead to the application becoming unresponsive or crashing, impacting its availability. The ffmpeg package is not shipped in base Red Hat Enterprise Linux. It is available through EPEL, Red Hat Enterprise Linux AI, and as a bundled dependency in Red Hat OpenShift AI container images. The vulnerable code resides in the bilinear interpolation routines of libswscale/output.c, which is core production code used by virtually all FFmpeg scaling operations. Despite the original CVE description referencing a function named 'target_sws_fuzzer', this is not a fuzzer-only issue — the integer overflows occur in production scaling code paths. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-190. Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-38347] Heap overflow vulnerability leads to Denial of Service
A heap overflow in the ff_sws_alphablendaway function (libswscale/alphablend.c) of FFmpeg git-master commit 722a217 allows attackers to cause a Denial of Service (DoS) via a crafted input. A flaw was found in FFmpeg. Successful exploitation could lead to the application becoming unresponsive or crashing. The ffmpeg package is not shipped in base Red Hat Enterprise Linux. It is available through EPEL, Red Hat Enterprise Linux AI, and as a bundled dependency in Red Hat OpenShift AI container images. The vulnerable code resides in libswscale, which is compiled and shipped in all FFmpeg builds across these products. This is a heap overflow rather than a simple denial of service, which could potentially have higher impact if the overflow is controllable by an attacker. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-38348] Denial of Service via crafted image file due to integer overflow
An integer overflow in the libswscale/utils.c component of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via supplying a crafted image file. This could lead to the application becoming unresponsive or crashing. The ffmpeg package is not shipped in base Red Hat Enterprise Linux. It is available through EPEL, Red Hat Enterprise Linux AI, and as a bundled dependency in Red Hat OpenShift AI container images. The vulnerable code resides in libswscale, which is compiled and shipped in all FFmpeg builds across these products. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-190. Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-38343] Denial of Service via integer overflow in video scaling
An integer overflow in the libavfilter/vf_scale.c component of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via supplying a crafted video file. A flaw was found in FFmpeg. This can lead to the application becoming unresponsive or crashing. The ffmpeg package is not shipped in base Red Hat Enterprise Linux. It is available through EPEL, Red Hat Enterprise Linux AI, and as a bundled dependency in Red Hat OpenShift AI container images. The vulnerable code resides in libavfilter, which is compiled and shipped in all FFmpeg builds across these products. This vulnerability has low practical impact as FFmpeg already rejects the invalid output size with an error; the integer overflow is undefined behavior detected by sanitizers but does not result in memory corruption. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-190. Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-38345] Denial of Service via division-by-zero vulnerability in `ff_sws_init_single_context` function.
A Division-by-Zero vulnerability in the ff_sws_init_single_context function (/libswscale/utils.c) of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via a crafted input. A flaw was found in FFmpeg. This can lead to the application becoming unresponsive or crashing. The ffmpeg package is not shipped in base Red Hat Enterprise Linux. It is available through EPEL, Red Hat Enterprise Linux AI, and as a bundled dependency in Red Hat OpenShift AI container images. The vulnerable code resides in libswscale, which is compiled and shipped in all FFmpeg builds across these products. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-369. Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-38346] Denial of Service via crafted video file due to integer overflow
An integer overflow in the yuv2planeX_8_c() function (libswscale/output.c) of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via supplying a crafted video file. A flaw was found in FFmpeg. This can lead to the application becoming unresponsive or crashing, impacting system availability. The ffmpeg package is not shipped in base Red Hat Enterprise Linux. It is available through EPEL, Red Hat Enterprise Linux AI, and as a bundled dependency in Red Hat OpenShift AI container images. The vulnerable code resides in libswscale, which is compiled and shipped in all FFmpeg builds across these products. 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-190. Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-38344] Denial of Service via crafted video file
A NULL pointer dereference in the get_min_buffer_size function (/libswscale/slice.c) of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via supplying a crafted video file. A flaw was found in FFmpeg. An attacker could exploit this by providing a malicious video file, leading to a Denial of Service (DoS). A Denial of Service attack prevents legitimate users from accessing a service or resource. The ffmpeg package is not shipped in base Red Hat Enterprise Linux. It is available through EPEL, Red Hat Enterprise Linux AI, and as a bundled dependency in Red Hat OpenShift AI container images. The vulnerable code resides in libswscale, which is compiled and shipped in all FFmpeg builds across these products. Red Hat severity: Moderate — CVSS 5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-476. Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Low [CVE-2026-59277] org.springframework.security/spring-security-core: Spring Security: Information disclosure due to incomplete internal network classification
Spring Security's InetAddressMatchers utility provides matchInternal() and matchExternal() builders for constructing an InetAddressMatcher that classifies a given IP address as belonging to an internal (private) or external (public) network. In Spring Security 7.1.0, the internal address classification did not recognize the IPv4 and IPv6 any local addresses (0.0.0.0 and::) as internal. As a result, matchExternal() incorrectly classified these addresses as external, and matchInternal() failed to classify them as internal. Applications that rely on matchInternal() or matchExternal() for IP-based access control may incorrectly treat these addresses as external, potentially allowing unauthorized read access to resources intended for internal networks only. Red Hat OpenShift Jenkins (ocp-tools) in Red Hat OpenShift Container Platform 4.20 includes Spring Security 7.1.0 and is affected. Other Red Hat Hybrid Platforms products evaluated for this flaw, including Red Hat OpenShift Dev Spaces, do not include the affected Spring Security version and are not affected. Red Hat severity: Low — CVSS 3.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N). Weakness: CWE-184. Affected Red Hat products: OpenShift Developer Tools and Services; Red Hat Fuse 7; Red Hat OpenShift Dev Spaces; Red Hat Single Sign-On 7.