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-2026-34980] Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network
Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network. Red Hat rates this moderate (CVSS 6.4). Weakness: CWE-78. Affected package(s): cups-main. Resolved in Red Hat advisory RHSA-2026:8814 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-34979] Denial of Service via heap-based buffer overflow in job attribute processing
Denial of Service via heap-based buffer overflow in job attribute processing. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-120. Affected package(s): cups-main. Resolved in Red Hat advisory RHSA-2026:8814 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-34978] Denial of Service via path traversal in RSS notifier
Denial of Service via path traversal in RSS notifier. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-22. Affected package(s): cups-main. Resolved in Red Hat advisory RHSA-2026:8814 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-34990] Privilege escalation via arbitrary file overwrite due to coerced authentication
Privilege escalation via arbitrary file overwrite due to coerced authentication. Red Hat rates this moderate (CVSS 5.2). Weakness: CWE-73. Affected package(s): cups-main. Resolved in Red Hat advisory RHSA-2026:8814 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-27447] Authorization bypass via case-insensitive username comparison
Authorization bypass via case-insensitive username comparison. Red Hat rates this moderate (CVSS 6.4). Weakness: CWE-178. Affected package(s): cups-main. Resolved in Red Hat advisory RHSA-2026:8814 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-35536] Cookie attribute injection due to improper handling of cookie arguments
Cookie attribute injection due to improper handling of cookie arguments. Red Hat rates this moderate (CVSS 5.4). Weakness: CWE-88. Affected package(s): python-tornado. Resolved in Red Hat advisory RHSA-2026:24342 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-34743] Denial of Service via buffer overflow in index decoding
Denial of Service via buffer overflow in index decoding. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-131. Affected package(s): xz-main. Resolved in Red Hat advisory RHSA-2026:7647 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-35414] Security bypass via mishandling of authorized_keys principals option
Security bypass via mishandling of authorized_keys principals option. Red Hat rates this moderate (CVSS 4.8). Weakness: CWE-168. Affected package(s): openssh, rhaiis/model-opt-cuda-rhel9:1780681984, rhui5/rhua-rhel9:1779798222, discovery/discovery-server-rhel9:1778101579, rhui5/installer-rhel9:1779798165. Resolved in Red Hat advisory RHSA-2026:14937 — 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 1.
Medium [CVE-2026-4325] Replay of action tokens via improper handling of single-use entries
Replay of action tokens via improper handling of single-use entries. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-653. Affected package(s): rhbk/keycloak-rhel9-operator:26.2, rhbk/keycloak-rhel9, rhbk/keycloak-operator-bundle:26.4.11, rhbk/keycloak-rhel9:26.2, rhbk/keycloak-operator-bundle:26.2.15, rhbk/keycloak-rhel9-operator:26.4. Resolved in Red Hat advisory RHSA-2026:6478 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-2950] Prototype pollution allows deletion of built-in prototype properties via array path bypass
Prototype pollution allows deletion of built-in prototype properties via array path bypass. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-915. Affected package(s): nodejs20-main, rhdh/rhdh-hub-rhel9:1780930740, nodejs25-main, yarnpkg-main. Resolved in Red Hat advisory RHSA-2026:7655 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-34043] Denial of Service via specially crafted array-like object serialization
Denial of Service via specially crafted array-like object serialization. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-835. Affected package(s): openshift4/ose-networking-console-plugin-rhel9:1778256287, dotnet8.0, openshift4/ose-networking-console-plugin-rhel9:1778644858, openshift4/ose-networking-console-plugin-rhel9:1779256322, openshift4/ose-networking-console-plugin-rhel9:1782211435, openshift4/ose-networking-console-plugin-rhel9:1778532500. Resolved in Red Hat advisory RHSA-2026:21291 — 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-2026-5282] Out of bounds read in WebCodecs
Out of bounds read in WebCodecs. Red Hat rates this important (CVSS 6.5). Weakness: CWE-125. 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-2026-5276] Insufficient policy enforcement in WebUSB
Insufficient policy enforcement in WebUSB. Red Hat rates this important (CVSS 6.5). Weakness: CWE-280. 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-2026-33985] Information disclosure via heap memory out of bounds read
Information disclosure via heap memory out of bounds read. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-125. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:19142 — 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; Red Hat Enterprise Linux 1.
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.