Red Hat Linux Security Advisories & CVEs
6249 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-2026-33982] Information disclosure and denial of service via heap-buffer-overflow read
Information disclosure and denial of service via heap-buffer-overflow read. Red Hat rates this moderate (CVSS 6.6). Weakness: CWE-125. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:16014 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1.
Medium [CVE-2026-21711] Unauthorized inter-process communication due to missing Unix Domain Socket permission checks
Unauthorized inter-process communication due to missing Unix Domain Socket permission checks. Red Hat rates this moderate (CVSS 5.2). Weakness: CWE-940. 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-2026-21713] Information disclosure via timing oracle in HMAC verification
Information disclosure via timing oracle in HMAC verification. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-208. 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-2026-21714] Memory leak and Denial of Service via crafted HTTP/2 WINDOW_UPDATE frames
Memory leak and Denial of Service via crafted HTTP/2 WINDOW_UPDATE frames. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-772. 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-2026-21717] Denial of Service via V8 string hashing mechanism due to predictable hash collisions
Denial of Service via V8 string hashing mechanism due to predictable hash collisions. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-328. Affected package(s): nodejs20-main, nodejs25-main, nodejs24, nodejs22-main, nodejs:24, nodejs24-main. 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-2026-4046] Denial of Service via iconv() function with specific character sets
Denial of Service via iconv() function with specific character sets. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-617. Affected package(s): rhui5/haproxy-rhel9:1781525671, insights-proxy/insights-proxy-container-rhel9:1780420428, glibc, rhui5/installer-rhel9:1781525693, costmanagement/costmanagement-metrics-rhel9-operator:1780946239, rhui5/cds-rhel9:1781525684. Resolved in Red Hat advisory RHSA-2026:29197 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 8.
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.