Red Hat Linux Security Advisories & CVEs
6143 advisories tracked · Red Hat Security Data API · direct feeds checked every minute; rate-limited backstops use a safe source cadence
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Security advisories for your Red Hat release
Pick your distribution release to see every advisory issued for it and its severity mix. Fixes ship as errata — keep the system patched. This is the release's advisory history, not a per-package scan.
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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 Red Hat advisories
Medium [CVE-2026-21712] Denial of Service via malformed Internationalized Domain Name processing
Denial of Service via malformed Internationalized Domain Name processing. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-168. Affected package(s): nodejs24, nodejs:24. Resolved in Red Hat advisory RHSA-2026:7350 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1.
Medium [CVE-2026-5119] Information disclosure via cleartext transmission of cookies during HTTPS tunnel establishment
Information disclosure via cleartext transmission of cookies during HTTPS tunnel establishment. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-319. Affected package(s): libsoup, libsoup3. Resolved in Red Hat advisory RHSA-2026:13978 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-20643] Processing maliciously crafted web content may bypass Same Origin Policy
Processing maliciously crafted web content may bypass Same Origin Policy. Red Hat rates this moderate (CVSS 5.4). Weakness: CWE-346. Affected package(s): webkit2gtk3, webkitgtk4. Resolved in Red Hat advisory RHSA-2026:19206 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-20665] Processing maliciously crafted web content may prevent Content Security Policy from being enforced
Processing maliciously crafted web content may prevent Content Security Policy from being enforced. Red Hat rates this moderate (CVSS 5.4). Weakness: CWE-693. Affected package(s): webkit2gtk3, webkitgtk4. Resolved in Red Hat advisory RHSA-2026:19206 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-20691] A maliciously crafted webpage may be able to fingerprint the user
A maliciously crafted webpage may be able to fingerprint the user. Red Hat rates this moderate (CVSS 4.3). Weakness: CWE-497. Affected package(s): webkit2gtk3, webkitgtk4. Resolved in Red Hat advisory RHSA-2026:19206 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-28861] A malicious website may be able to access script message handlers intended for other origins
A malicious website may be able to access script message handlers intended for other origins. Red Hat rates this important (CVSS 4.3). Weakness: CWE-346. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released. Affected product named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-28871] Visiting a maliciously crafted website may lead to a cross-site scripting attack
Visiting a maliciously crafted website may lead to a cross-site scripting attack. Red Hat rates this moderate (CVSS 4.3). Weakness: CWE-79. Affected package(s): webkit2gtk3, webkitgtk4. Resolved in Red Hat advisory RHSA-2026:19206 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-33748] Unauthorized file access via Git URL fragment subdir components
Unauthorized file access via Git URL fragment subdir components. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-22. Affected package(s): openshift-service-mesh/istio-proxyv2-rhel9:1776240392, multicluster-engine/must-gather-rhel9:1782158798, openshift-service-mesh/istio-proxyv2-rhel9:1776291540, openshift-service-mesh/istio-proxyv2-rhel9:1776315466, oadp/oadp-mustgather-rhel9:1779770049, oadp/oadp-mustgather-rhel9:1779770057. Resolved in Red Hat advisory RHSA-2026:9453 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-4948] local unprivileged user can modify firewall state due to d-bus setter mis-authorization
A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N). Weakness: CWE-279. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat OpenShift Container Platform 4. Red Hat fixing advisory: RHBA-2026:28238, RHSA-2026:67843, RHSA-2026:67585. Affected products named by the advisory: Red Hat package: firewalld.
Medium [CVE-2026-34352] TigerVNC x0vncserver: Information disclosure, data manipulation, and denial of service via incorrect permissions
TigerVNC x0vncserver: Information disclosure, data manipulation, and denial of service via incorrect permissions. Red Hat rates this moderate (CVSS 6.3). Weakness: CWE-279. Affected package(s): tigervnc. Resolved in Red Hat advisory RHSA-2026:24341 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.
Medium [CVE-2026-33671] Regular Expression Denial of Service via crafted extglob patterns
Regular Expression Denial of Service via crafted extglob patterns. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-1333. Affected package(s): cluster-observability-operator/logging-console-plugin-pf4-rhel9:1782839279, cluster-observability-operator/troubleshooting-panel-console-plugin-pf6-rhel9:1782839996, cluster-observability-operator/logging-console-plugin-pf5-rhel9:1782840539. Resolved in Red Hat advisory RHSA-2026:34342 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-32287] Denial of Service due to infinite loop via boolean XPath expressions
Denial of Service due to infinite loop via boolean XPath expressions. Red Hat rates this moderate (CVSS 6.2). Weakness: CWE-606. Affected package(s): rhosdt/opentelemetry-collector-rhel9:1776185379. Resolved in Red Hat advisory RHSA-2026:9388 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-4923] Denial of Service via specially crafted paths with multiple wildcards
Denial of Service via specially crafted paths with multiple wildcards. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-1333. Affected package(s): rhdh/rhdh-hub-rhel9:1780930740. Resolved in Red Hat advisory RHSA-2026:24841 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-4867] Denial of Service via catastrophic backtracking from malformed URL parameters
Denial of Service via catastrophic backtracking from malformed URL parameters. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-1333. Affected package(s): cluster-observability-operator/logging-console-plugin-pf4-rhel9:1782839279, cluster-observability-operator/troubleshooting-panel-console-plugin-pf6-rhel9:1782839996, cluster-observability-operator/logging-console-plugin-pf5-rhel9:1782840539. Resolved in Red Hat advisory RHSA-2026:34342 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-4897] Polkit: polkit: denial of service via unbounded input processing through standard input
A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system. A moderate severity issue, a denial of service flaw exists in polkit where a local attacker can exhaust system memory. This vulnerability arises from the `polkit-agent-helper-1` setuid binary processing excessively long input via standard input without size limitations, leading to an out-of-memory condition. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-770. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Hardened Images; 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 fixing advisory: RHSA-2026:59997, RHSA-2026:66287. Affected products named by the advisory: Red Hat package: polkit.
Medium [CVE-2026-4887] GIMP:Memory disclosure and denial of service via specially crafted PCX image
GIMP:Memory disclosure and denial of service via specially crafted PCX image. Red Hat rates this moderate (CVSS 6.1). Weakness: CWE-193. Affected package(s): gimp, gimp:2.8. Resolved in Red Hat advisory RHSA-2026:17533 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-33809] Denial of Service via maliciously crafted TIFF file
Denial of Service via maliciously crafted TIFF file. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-1285. Affected package(s): golang1. Resolved in Red Hat advisory RHSA-2026:7385 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-34085] Security flaw allows arbitrary code execution or system crash
Security flaw allows arbitrary code execution or system crash. Red Hat rates this moderate (CVSS 6.6). Weakness: CWE-193. Affected package(s): fontconfig-main. Resolved in Red Hat advisory RHSA-2026:13722 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-3591] Unauthorized access due to use-after-return vulnerability in DNS query handling
Unauthorized access due to use-after-return vulnerability in DNS query handling. Red Hat rates this moderate (CVSS 5.4). Weakness: CWE-825. Affected package(s): bind-main. Resolved in Red Hat advisory RHSA-2026:6935 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-3119] Denial of Service via authenticated TKEY queries
Denial of Service via authenticated TKEY queries. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-237. Affected package(s): bind-main. Resolved in Red Hat advisory RHSA-2026:6935 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.