Red Hat Linux Security Advisories & CVEs
4891 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-2026-34282] Enhance TLS connection handling (Oracle CPU 2026-04)
Enhance TLS connection handling (Oracle CPU 2026-04). Red Hat rates this important (CVSS 7.5). Weakness: CWE-835. Affected package(s): java. Resolved in Red Hat advisory RHSA-2026:11829 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Build of OpenJDK 17.0.19; Red Hat Build of OpenJDK 17.0.9; Red Hat Build of OpenJDK 21.0.11; Red Hat Build of OpenJDK 25.0.3; and 17 more.
High [CVE-2026-40895] Information disclosure via cross-domain redirects
Information disclosure via cross-domain redirects. Red Hat rates this important (CVSS 7.5). Weakness: CWE-212. Affected package(s): openshift-service-mesh/kiali-rhel9:1778164042, rhoai/odh-mod-arch-model-registry-rhel9:1780467147, rhoai/odh-mod-arch-gen-ai-rhel9:1778473763, devspaces/openvsx-rhel9:1779528224, rhoai/odh-dashboard-rhel9:1779189627, cryostat/cryostat-openshift-console-plugin-rhel9:4.2.0. Resolved in Red Hat advisory RHSA-2026:13826 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Cryostat 4 on RHEL 9; Red Hat Advanced Cluster Management for Kubernetes 2.14; Red Hat Advanced Cluster Management for Kubernetes 2.15; Red Hat Advanced Cluster Security for Kubernetes 4.10; and 43 more.
High [CVE-2026-40890] Denial of Service via malformed Markdown input
Denial of Service via malformed Markdown input. Red Hat rates this moderate (CVSS 7.5). Weakness: CWE-1286. Affected package(s): multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779925273, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1780167118, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439, rhacm2/acm-grafana-rhel9:1780677003. 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.
High [CVE-2026-40611] Arbitrary file write and deletion via path traversal from a malicious ACME server
Arbitrary file write and deletion via path traversal from a malicious ACME server. Red Hat rates this important (CVSS 8.8). Weakness: CWE-22. Affected package(s): devspaces/traefik-rhel9:1779786779. Resolved in Red Hat advisory RHSA-2026:21772 — update the affected packages (`sudo dnf update`). Affected product named by the advisory: Red Hat OpenShift Dev Spaces 3.28.
High [CVE-2026-40161] Information disclosure of Git API token via user-controlled serverURL
Information disclosure of Git API token via user-controlled serverURL. Red Hat rates this moderate (CVSS 7.7). Weakness: CWE-918. Affected package(s): openshift-builds/openshift-builds-webhook-rhel9:1780374084, openshift-builds/openshift-builds-controller-rhel9:1780373846, serve-tkn-cli, openshift-builds/openshift-builds-image-processing-rhel9:1780373835, openshift-builds/openshift-builds-git-cloner-rhel9:1780374151, openshift-builds/openshift-builds-rhel9-operator:1780480839. Resolved in Red Hat advisory RHSA-2026:24484 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
High [CVE-2026-6786] Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150
Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:10757 — 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 9 more.
High [CVE-2026-6784] Memory safety bugs fixed in Firefox 150 and Thunderbird 150
Memory safety bugs fixed in Firefox 150 and Thunderbird 150. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. 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-2026-6785] Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150
Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:10757 — 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 9 more.
High [CVE-2026-6754] Use-after-free in the JavaScript Engine component
Use-after-free in the JavaScript Engine component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:10757 — 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 9 more.
High [CVE-2026-6752] Incorrect boundary conditions in the WebRTC component
Incorrect boundary conditions in the WebRTC component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-131. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:10757 — 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 9 more.
High [CVE-2026-6753] Incorrect boundary conditions in the WebRTC component
Incorrect boundary conditions in the WebRTC component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:10757 — 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 9 more.
High [CVE-2026-6751] Uninitialized memory in the Audio/Video: Web Codecs component
Uninitialized memory in the Audio/Video: Web Codecs component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-824. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:10757 — 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 9 more.
High [CVE-2026-6750] Privilege escalation in the Graphics: WebRender component
Privilege escalation in the Graphics: WebRender component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-266. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:10757 — 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 9 more.
High [CVE-2026-6749] Information disclosure due to uninitialized memory in the Graphics: Canvas2D component
Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-824. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:10757 — 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 9 more.
High [CVE-2026-6747] Use-after-free in the WebRTC component
Use-after-free in the WebRTC component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:10757 — 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 9 more.
High [CVE-2026-6746] 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). Weakness: CWE-825. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:10757 — 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 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 9 more.
High [CVE-2026-40244] Arbitrary code execution via integer overflow in EXR image processing
Arbitrary code execution via integer overflow in EXR image processing. Red Hat rates this important (CVSS 8.2). Weakness: CWE-190. 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-2026-28684] Arbitrary file overwrite via symbolic link following
Arbitrary file overwrite via symbolic link following. Red Hat rates this moderate (CVSS 7.1). Weakness: CWE-59. Affected package(s): rhoai/odh-mlserver-rhel9:1778262856, rhoai/odh-feature-server-rhel9:1780069135, rhoai/odh-kserve-storage-initializer-rhel9:1780069127, rhoai/odh-vllm-gaudi-rhel9:1780069069, satellite/iop-host-inventory-rhel9:1780414237, rhoai/odh-vllm-gaudi-rhel9:1778600187. Resolved in Red Hat advisory RHSA-2026:19712 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
High [CVE-2026-33557] Authentication bypass via improper JWT validation
Authentication bypass via improper JWT validation. Red Hat rates this important (CVSS 8.6). Weakness: CWE-303. 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 build of Debezium 3.
High [CVE-2026-6654] Memory corruption vulnerability via Double-Free/Use-After-Free
Memory corruption vulnerability via Double-Free/Use-After-Free. Red Hat rates this important (CVSS 7.3). Weakness: CWE-1341. 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.