Red Hat Linux Red Hat Enterprise Linux Vulnerabilities & Security Advisories
1233 advisories tracked · Red Hat Security Data API · 3 listed in the CISA Known Exploited Vulnerabilities catalog
Every row below is a published Red Hat Linux advisory that VulniPulse classified as Red Hat Enterprise Linux, with the CVEs, affected and fixed releases and exploitation status the vendor stated. Severity mix: 31 critical, 789 high, 388 medium, 25 low.
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Red Hat Security Data API
Red Hat Enterprise Linux errata (RHSA) via the official Red Hat Security Data API — CVE severity, CVSS and affected packages. A credential-free official source.
Latest Linux Red Hat Enterprise Linux advisories
High [CVE-2026-33630] Use-after-free / double-free in query-completion handling
Use-after-free / double-free in query-completion handling. Red Hat rates this important (CVSS 7.5). Weakness: CWE-416. Red Hat lists fixing advisory RHSA-2026:42096 with package c-ares-0:1.34.6-2.el10_2, c-ares-main-1.34.7-1.hum1. Affected product named by the advisory: Red Hat Enterprise Linux 1.
Medium [CVE-2025-12799] Jastow Cross-Site Scripting attack due to unsanitized URI
Jastow Cross-Site Scripting attack due to unsanitized URI. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-79. Red Hat lists fixing advisory RHSA-2026:36343 with package eap8-elytron-web-0:4.1.2-1.Final_redhat_00001.1.el10eap, eap8-jboss-ejb-client-0:5.0.8-1.Final_redhat_00001.1.el10eap, eap8-jandex-0:3.2.7-1.redhat_00001.1.el10eap, eap8-javaee-security-soteria-0:3.0.3-2.redhat_00001.1.el10eap. Affected product named by the advisory: Red Hat Enterprise Linux 1.
High [CVE-2026-55379] Denial of Service via crafted BDF font file
Denial of Service via crafted BDF font file. Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. Red Hat lists fixing advisory RHSA-2026:39127 with package python-pillow-0:5.1.1-22.el8_10. Affected product named by the advisory: Red Hat Enterprise Linux 8.
High [CVE-2026-55380] Denial of Service via crafted GD 2.x image file
Denial of Service via crafted GD 2.x image file. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1285. Red Hat lists fixing advisory RHSA-2026:39127 with package python-pillow-0:5.1.1-22.el8_10. Affected product named by the advisory: Red Hat Enterprise Linux 8.
High [CVE-2026-54060] Denial of Service via excessive memory allocation when processing font files
Denial of Service via excessive memory allocation when processing font files. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1050. Red Hat lists fixing advisory RHSA-2026:39127 with package python-pillow-0:5.1.1-22.el8_10. Affected product named by the advisory: Red Hat Enterprise Linux 8.
High [CVE-2026-54059] Denial of Service via crafted PCF font data
Denial of Service via crafted PCF font data. Red Hat rates this important (CVSS 7.5). Weakness: CWE-409. Red Hat lists fixing advisory RHSA-2026:39127 with package python-pillow-0:5.1.1-22.el8_10. Affected product named by the advisory: Red Hat Enterprise Linux 8.
High [CVE-2026-58380] Gimp: gimp: stack buffer overflow in pnmscanner_gettoken
A flaw was found in GIMP's PNM file format parser. When parsing a specially crafted PNM file, the pnmscanner_gettoken() function writes a null terminator one byte past the end of a stack-allocated buffer due to an off-by-one error in the loop boundary check. This could lead to memory corruption, potentially resulting in denial of service or arbitrary code execution. Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8.
High [CVE-2026-53359] Fix shadow paging use-after-free due to unexpected role
Fix shadow paging use-after-free due to unexpected role. Red Hat rates this important (CVSS 7.8). Weakness: CWE-825. Red Hat lists fixing advisory RHSA-2026:36957 with package rhcos-4.22.9.8.202607152026-0, kernel-0:5.14.0-570.127.1.el9_6, kernel-0:4.18.0-477.154.1.el8_8, kernel-0:5.14.0-427.137.1.el9_4. Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 1.
Critical [CVE-2026-14544 +1] Incomplete Fix for CVE-2026-8631
Incomplete Fix for CVE-2026-8631. Red Hat rates this important (CVSS 9.8). Weakness: CWE-190. Red Hat lists fixing advisory RHSA-2026:40894 with package hplip-0:3.23.12-10.el10_2.5, hplip-0:3.21.2-6.el9_8.5, hplip-0:3.18.4-14.el8_10. Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.
High [CVE-2026-5136] Privilege escalation to administrator-level access via usergroup role assignment manipulation
Privilege escalation to administrator-level access via usergroup role assignment manipulation. Red Hat rates this important (CVSS 8.8). Weakness: CWE-266. Red Hat lists fixing advisory RHSA-2026:34366 with package foreman-0:3.14.0.17-1.el9sat, foreman-0:3.18.0.7-1.el9sat, foreman-0:3.12.0.17-1.el9sat, foreman-0:3.12.0.17-1.el8sat. Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.
Medium [CVE-2026-5138] Information disclosure via improper validation of nested request parameters
Information disclosure via improper validation of nested request parameters. Red Hat rates this moderate (CVSS 4.3). Weakness: CWE-639. Red Hat lists fixing advisory RHSA-2026:34366 with package foreman-0:3.14.0.17-1.el9sat, foreman-0:3.18.0.7-1.el9sat, foreman-0:3.12.0.17-1.el9sat, foreman-0:3.12.0.17-1.el8sat. Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.
Medium [CVE-2026-58015] Glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and mechanism_client_data_receive
A flaw was found in GLib. The D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL authentication mechanism does not validate the cookie_context parameter received from the server. A malicious D-Bus server can supply a cookie_context containing path traversal sequences, causing the client to read an arbitrary file and exfiltrate sensitive data by verifying guessed file contents against a generated hash. To exploit this flaw, an attacker must be in a position to perform a man-in-the-middle (MitM) attack on the connection or operate a malicious server that the client connects to. Furthermore, extracting data requires an oracle attack (guessing and hashing), increasing the complexity of exploitation. However, if successful, this issue allows the exfiltration of sensitive secrets, such as SSH keys or API tokens, from the filesystem. Due to these reasons, this vulnerability has been rated with a moderate severity. 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-22. Affected Red Hat products: 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 lists Red Hat Hardened Images as not affected. Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-55956] Improper Authorization Allows Security Constraint Bypass
Improper Authorization Allows Security Constraint Bypass. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-551. Red Hat lists fixing advisory RHSA-2026:39189 with package tomcat11-main-11.0.23-0.1.hum1, tomcat-catalina, jws7-tomcat-0:11.0.21-5.redhat_00004.1.el10jws, jws7-tomcat-0:11.0.21-5.redhat_00004.1.el8jws. Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-58050] Heap buffer overflow via integer overflow in publickey attribute allocation
libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer overflow in a connecting libssh2 client. A flaw in libssh2 allows a malicious SSH server to trigger a memory overflow by sending a manipulated attribute count. This can cause the connecting client to crash or allow unauthorized code execution. By manipulating the publickey-subsystem response, an attacker could cause an integer overflow, potentially leading to denial of service or arbitrary code execution on Red Hat systems using libssh2 to establish SSH connections. Note: Red Hat Enterprise Linux (RHEL) 8 and newer are not affected by this flaw, as they do not ship the libssh2 package. Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H). Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Hardened Images. Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-13503] antlr ANTLR4: Path traversal via manipulation of getImportedVocabFile function
A vulnerability was detected in antlr ANTLR4 up to 4.13.2. Affected by this issue is the function getImportedVocabFile of the file tool/src/org/antlr/v4/parse/TokenVocabParser.java of the component tokenVocab Grammar Option Handler. The manipulation results in path traversal. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way. This could allow unauthorized access to sensitive files and directories on the system. Successful exploitation requires a specific scenario where an application using ANTLR4 is configured to accept and parse untrusted, attacker-supplied grammar files containing a manipulated tokenVocab option. 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-22. Affected Red Hat products: 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. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-58058] Denial of Service via crafted IPv6 response
Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans. A flaw was found in Nmap. This can lead to an integer underflow, causing out-of-bounds reads and a denial of service (DoS) due to a crash during raw IPv6 scans. Red Hat rates this flaw as Moderate rather than the AI-assigned Important severity. The Aegis AI-Bot rated UI:N (no user interaction), but nmap is a command-line scanning tool that an operator must manually invoke — initiating a scan is user interaction per the CVSS definition of UI:R. Correcting UI:N to UI:R reduces the CVSS from 7.5 to 6.5, aligning with the upstream CVEORG assessment. Weakness: CWE-125. Affected Red Hat products: 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. Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-58051] Denial of service or information disclosure via malformed SSH publickey response
libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client. A flaw in libssh2 allows a malicious SSH server to send a malformed public key response, triggering an invalid memory cleanup. This can cause the connecting client application to crash or leak information. Moderate: This flaw in libssh2 can lead to a denial of service or information disclosure in client applications when connecting to a malicious SSH server. The vulnerability arises from improper handling of uninitialized memory during public key list processing, which an attacker can trigger with a specially crafted response. Exploitation requires active interaction with a compromised or malicious server, limiting the attack surface to untrusted connections. Note: Red Hat Enterprise Linux (RHEL) 8 and newer are not affected by this flaw, as they do not ship the libssh2 package. 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-824.
High [CVE-2026-57231] Information disclosure via malicious container image environment variables
Information disclosure via malicious container image environment variables. Red Hat rates this important (CVSS 7.5). Weakness: CWE-914. Red Hat lists fixing advisory RHSA-2026:37123 with package podman-7:5.8.2-4.el10_2, podman-6:5.8.2-4.el9_8, podman-main-6.0.0-1.hum1, container-tools:rhel8-8100020260709093628.afee755d. Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9.
High [CVE-2026-48618] Authentication bypass due to TLS hostname handling and unicode dot separator mismatch
Authentication bypass due to TLS hostname handling and unicode dot separator mismatch. Red Hat rates this important (CVSS 7.7). Weakness: CWE-289. Red Hat lists fixing advisory RHSA-2026:39246 with package nodejs20-main-20.20.2-1.hum1, nodejs22-main-22.23.1-1.hum1, nodejs24-main-24.18.0-0.1.hum1, nodejs26-main-26.4.0-1.2.hum1. Affected product named by the advisory: Red Hat Enterprise Linux 1.
High [CVE-2026-48933] Denial of Service via large input to subtle.encrypt
Denial of Service via large input to subtle.encrypt(). Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. Red Hat lists fixing advisory RHSA-2026:39246 with package nodejs20-main-20.20.2-1.hum1, nodejs22-main-22.23.1-1.hum1, nodejs24-main-24.18.0-0.1.hum1, nodejs26-main-26.4.0-1.2.hum1. Affected product named by the advisory: Red Hat Enterprise Linux 1.