Red Hat Linux Security Advisories & CVEs
4893 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
High [CVE-2026-27959] Host header injection vulnerability due to malformed HTTP Host header parsing
Host header injection vulnerability due to malformed HTTP Host header parsing. Red Hat rates this important (CVSS 8.2). Weakness: CWE-20. Affected package(s): rhoai/odh-mod-arch-model-registry-rhel9:1776742141, rhoai/odh-dashboard-rhel9:1776742021, openshift4/ose-monitoring-plugin-rhel9:1775577192. Resolved in Red Hat advisory RHSA-2026:10184 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat OpenShift AI 2.25; Red Hat OpenShift Container Platform 4.19; Red Hat Developer Hub.
High [CVE-2026-27942] Stack overflow leads to Denial of Service
Stack overflow leads to Denial of Service. Red Hat rates this moderate (CVSS 7.5). Weakness: CWE-776. Affected package(s): odf4/mcg-core-rhel9:1776403991, odf4/mcg-rhel9-operator:1776404009, odf4/odf-cloudnative-pg-rhel9-operator:1776406131, odf4/odf-external-snapshotter-rhel9-operator:1776406284, odf4/odf-external-snapshotter-sidecar-rhel9:1776406291, advanced-cluster-security/rhacs-main-rhel8:1775594284. Resolved in Red Hat advisory RHSA-2026:7110 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
High [CVE-2026-27896] improper handling of case sensitivity
improper handling of case sensitivity. Red Hat rates this important (CVSS 7.2). Weakness: CWE-178. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released. Affected products named by the advisory: OpenShift Lightspeed; OpenShift Serverless; Red Hat OpenShift AI (RHOAI).
High [CVE-2026-27830] Arbitrary Code Execution via deserialization of crafted objects
Arbitrary Code Execution via deserialization of crafted objects. Red Hat rates this important (CVSS 8). Weakness: CWE-502. Affected package(s): com.mchange/c3p0, org.hibernate.orm/hibernate-c3p0, eap8-hibernate, c3p0/c3p0, candlepin. Resolved in Red Hat advisory RHSA-2026:28385 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9; Red Hat Satellite 6.18 for RHEL 9; Red Hat build of Debezium 2; and 4 more.
High [CVE-2026-27148] Remote Code Execution via WebSocket Hijacking
Remote Code Execution via WebSocket Hijacking. Red Hat rates this important (CVSS 8.8). 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.
High [CVE-2026-26965] Arbitrary code execution via heap out-of-bounds write in RLE planar decode path
Arbitrary code execution via heap out-of-bounds write in RLE planar decode path. Red Hat rates this important (CVSS 8.8). Weakness: CWE-787. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:5936 — 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-2026-26955] Arbitrary code execution via heap buffer overflow in GDI surface pipeline
Arbitrary code execution via heap buffer overflow in GDI surface pipeline. Red Hat rates this important (CVSS 8.8). Weakness: CWE-805. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:5936 — 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-2026-25554] Authentication bypass due to SQL injection in JWT processing
Authentication bypass due to SQL injection in JWT processing. Red Hat rates this important (CVSS 8.2). Weakness: CWE-89. 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.
High [CVE-2026-27727] Arbitrary code execution via JNDI dereferencing of crafted objects
Arbitrary code execution via JNDI dereferencing of crafted objects. Red Hat rates this important (CVSS 8.3). Weakness: CWE-502. Affected package(s): candlepin, eap8-hibernate, mchange-commons-java. Resolved in Red Hat advisory RHSA-2026:18054 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat build of Apache Camel 4.14.4 for Spring Boot 3.5.11; Red Hat Build of Debezium 3.2; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9; and 9 more.
High [CVE-2026-27699] File overwrite due to path traversal
File overwrite due to path traversal. Red Hat rates this important (CVSS 7.5). Weakness: CWE-22. 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.
High [CVE-2026-26103] Missing Authorization Check Allows Unprivileged Users to Restore LUKS Headers via udisks D-Bus API
Missing Authorization Check Allows Unprivileged Users to Restore LUKS Headers via udisks D-Bus API. Red Hat rates this important (CVSS 7.1). Weakness: CWE-862. Affected package(s): udisks2. Resolved in Red Hat advisory RHSA-2026:5831 — update the affected packages (`sudo dnf update`). Affected product named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support.
High [CVE-2026-27628] possible infinite loop when loading circular /Prev entries in cross-reference streams
possible infinite loop when loading circular /Prev entries in cross-reference streams. Red Hat rates this moderate (CVSS 7.5). Weakness: CWE-835. Affected package(s): quay/quay-rhel9:1775069491, rhoai/odh-llama-stack-core-rhel9:1775144403, quay/quay-rhel8:1773771962, quay/quay-rhel8:1773971077, quay/quay-rhel9:1775169226, quay/quay-rhel8:1773936323. Resolved in Red Hat advisory RHSA-2026:10184 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
High [CVE-2026-27571] WebSockets pre-auth memory DoS
WebSockets pre-auth memory DoS. Red Hat rates this moderate (CVSS 7.5). Weakness: CWE-770. Affected package(s): multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1773650060, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1773650767. Resolved in Red Hat advisory RHSA-2026:6226 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
High [CVE-2026-2807] Memory safety bugs fixed in Firefox 148 and Thunderbird 148
Memory safety bugs fixed in Firefox 148 and Thunderbird 148. Red Hat rates this important (CVSS 7.5). 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.
High [CVE-2026-2799] Use-after-free in the DOM: Core & HTML component
Use-after-free in the DOM: Core & HTML component. Red Hat rates this important (CVSS 7.5). 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.
High [CVE-2026-2797] Use-after-free in the JavaScript: GC component
Use-after-free in the JavaScript: GC component. Red Hat rates this important (CVSS 7.5). 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.
High [CVE-2026-2796] JIT miscompilation in the JavaScript: WebAssembly component
JIT miscompilation in the JavaScript: WebAssembly component. Red Hat rates this important (CVSS 7.5). 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.
High [CVE-2026-2794] Information disclosure due to uninitialized memory in Firefox and Firefox Focus for Android
Information disclosure due to uninitialized memory in Firefox and Firefox Focus for Android. Red Hat rates this important (CVSS 7.5). 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.
High [CVE-2026-2793] Memory safety bugs fixed in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148
Memory safety bugs fixed in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Red Hat rates this important (CVSS 7.5). Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:3984 — 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-2026-2792] Memory safety bugs fixed in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148
Memory safety bugs fixed in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Red Hat rates this important (CVSS 7.5). Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:3984 — 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.