Red Hat Linux Security Advisories & Vulnerabilities
16040 advisories tracked · Red Hat Security Data API · direct feeds checked every minute; rate-limited sources checked less often
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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
High [CVE-2026-4697] Incorrect boundary conditions in the Audio/Video: Web Codecs component
Incorrect boundary conditions in the Audio/Video: Web Codecs component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4695] Incorrect boundary conditions in the Audio/Video: Web Codecs component
Incorrect boundary conditions in the Audio/Video: Web Codecs component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-131. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4696] Use-after-free in the Layout: Text and Fonts component
Use-after-free in the Layout: Text and Fonts component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4693] Incorrect boundary conditions in the Audio/Video: Playback component
Incorrect boundary conditions in the Audio/Video: Playback component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-823. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4694] Incorrect boundary conditions, integer overflow in the Graphics component
Incorrect boundary conditions, integer overflow in the Graphics component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-190. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4691] Use-after-free in the CSS Parsing and Computation component
Use-after-free in the CSS Parsing and Computation component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4692] Sandbox escape in the Responsive Design Mode component
Sandbox escape in the Responsive Design Mode component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-653. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4689] Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-190. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4688] Sandbox escape due to use-after-free in the Disability Access APIs component
Sandbox escape due to use-after-free in the Disability Access APIs component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4687] Sandbox escape due to incorrect boundary conditions in the Telemetry component
Sandbox escape due to incorrect boundary conditions in the Telemetry component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-501. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4685] Incorrect boundary conditions in the Graphics: Canvas2D component
Incorrect boundary conditions in the Graphics: Canvas2D component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-4684] Race condition, use-after-free in the Graphics: WebRender component
Race condition, use-after-free in the Graphics: WebRender component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-364. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-33554] buffer overflows on response messages via ipmi-oem
buffer overflows on response messages via ipmi-oem. Red Hat rates this moderate (CVSS 8.8). Weakness: CWE-120. Affected package(s): freeipmi. Resolved in Red Hat advisory RHSA-2026:19208 — 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 8.
Medium [CVE-2026-33215] Session and message hijacking via MQTT Client ID malfeasance
Session and message hijacking via MQTT Client ID malfeasance. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-290. Affected package(s): multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1780167118, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439. Resolved in Red Hat advisory RHSA-2026:21769 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-3889] Spoofing issue in Thunderbird
Spoofing issue in Thunderbird. Red Hat rates this low (CVSS 5.4). Weakness: CWE-20. Affected package(s): thunderbird. Resolved in Red Hat advisory RHSA-2026:8286 — 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-2026-33349] Denial of Service via unbounded entity expansion due to incorrect configuration limit handling
Denial of Service via unbounded entity expansion due to incorrect configuration limit handling. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-1284. 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-2026-28755] Certificate revocation bypass when OCSP is enabled
Certificate revocation bypass when OCSP is enabled. Red Hat rates this moderate (CVSS 5.4). Weakness: CWE-295. Affected package(s): nginx-main. Resolved in Red Hat advisory RHSA-2026:8346 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-4717] Privilege escalation in the Netmonitor component
Privilege escalation in the Netmonitor component. Red Hat rates this moderate (CVSS 6.1). Weakness: CWE-266. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — 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-2026-4716] Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component
Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component. Red Hat rates this moderate (CVSS 6.1). Weakness: CWE-824. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — 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-2026-4715] Uninitialized memory in the Graphics: Canvas2D component
Uninitialized memory in the Graphics: Canvas2D component. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-824. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — 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.
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