Red Hat Linux Security Advisories & Vulnerabilities
16067 advisories tracked · Red Hat Security Data API · direct feeds checked every minute; rate-limited sources checked less often
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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, so keep the system patched. This is the release's advisory history, not a per-package scan.
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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
Medium [CVE-2026-21937] DDL unspecified vulnerability (CPU Jan 2026)
DDL unspecified vulnerability (CPU Jan 2026). Red Hat rates this moderate (CVSS 4.9). Affected package(s): mysql8.4, mysql:8.0, mysql, mysql:8.4. Resolved in Red Hat advisory RHSA-2026:5580 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9.
Medium [CVE-2026-21964] Thread Pooling unspecified vulnerability (CPU Jan 2026)
Thread Pooling unspecified vulnerability (CPU Jan 2026). Red Hat rates this moderate (CVSS 4.9). Affected package(s): mysql8.4, mysql:8.0, mysql, mysql:8.4. Resolved in Red Hat advisory RHSA-2026:5580 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9.
Critical [CVE-2026-22797] OpenStack keystonemiddleware: Privilege escalation and user impersonation via forged authentication headers
OpenStack keystonemiddleware: Privilege escalation and user impersonation via forged authentication headers. Red Hat rates this important (CVSS 9.9). Weakness: CWE-290. Affected package(s): openshift4/ose-ironic-rhel9:1772029626, openshift4/ose-ironic-rhel9:1774266098, openshift4/ose-ironic-rhel9:1773138063, openshift4/ose-ironic-rhel9:1772477045, openshift4/ose-ironic-rhel9:1772176749. Resolved in Red Hat advisory RHSA-2026:3402 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat OpenShift Container Platform 4.17; Red Hat OpenShift Container Platform 4.18; Red Hat OpenShift Container Platform 4.19; Red Hat OpenShift Container Platform 4.20; and 1 more.
High [CVE-2026-23884] Denial of Service and potential code execution via use-after-free vulnerability
Denial of Service and potential code execution via use-after-free vulnerability. Red Hat rates this important (CVSS 7.6). Weakness: CWE-416. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:2952 — 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 11 more.
High [CVE-2026-23883] Arbitrary code execution and denial of service via malicious server
Arbitrary code execution and denial of service via malicious server. Red Hat rates this important (CVSS 7.6). Weakness: CWE-416. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:2952 — 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 8; Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions; and 3 more.
High [CVE-2026-23534] Arbitrary code execution and denial of service via client-side heap buffer overflow
Arbitrary code execution and denial of service via client-side heap buffer overflow. Red Hat rates this important (CVSS 7.6). Weakness: CWE-122. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:2952 — 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 8; Red Hat Enterprise Linux 9.4 Extended Update Support; Red Hat Enterprise Linux 9.6 Extended Update Support; and 1 more.
High [CVE-2026-23533] Heap buffer overflow leads to denial of service and potential code execution
Heap buffer overflow leads to denial of service and potential code execution. Red Hat rates this important (CVSS 7.6). Weakness: CWE-122. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:2952 — 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 11 more.
High [CVE-2026-23532] Denial of Service and potential code execution via client-side heap buffer overflow
Denial of Service and potential code execution via client-side heap buffer overflow. Red Hat rates this important (CVSS 7.6). Weakness: CWE-122. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:2952 — 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 11 more.
High [CVE-2026-23531] Heap buffer overflow via crafted RDPGFX surface updates leads to denial of service and potential code execution.
Heap buffer overflow via crafted RDPGFX surface updates leads to denial of service and potential code execution.. Red Hat rates this important (CVSS 7.6). Weakness: CWE-122. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:2952 — 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 11 more.
High [CVE-2026-23530] Heap buffer overflow leading to denial of service and potential code execution from a malicious server.
Heap buffer overflow leading to denial of service and potential code execution from a malicious server.. Red Hat rates this important (CVSS 7.6). Weakness: CWE-122. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:2952 — 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 11 more.
High [CVE-2025-68616] WeasyPrint Server-Side Request Forgery (SSRF)
WeasyPrint Server-Side Request Forgery (SSRF). Red Hat rates this important (CVSS 7.5). Weakness: CWE-918. 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 Ansible Automation Platform 2.
High [CVE-2026-0603] Information disclosure and data deletion via second-order SQL injection
Information disclosure and data deletion via second-order SQL injection. Red Hat rates this important (CVSS 8.3). Weakness: CWE-89. Affected package(s): eap7-hibernate, eap7-wildfly, org.hibernate/hibernate-core:5.3.38.Final-redhat. Resolved in Red Hat advisory RHSA-2026:4924 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7; Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7; Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7; Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8; and 10 more.
Medium [CVE-2026-23732] Denial of Service via FastGlyph parsing buffer overflow
Denial of Service via FastGlyph parsing buffer overflow. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-122. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:6958 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-1145] quickjs-ng quickjs: Heap-based buffer overflow leading to information disclosure or denial of service
quickjs-ng quickjs: Heap-based buffer overflow leading to information disclosure or denial of service. Red Hat rates this important (CVSS 6.3). 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.
Medium [CVE-2026-1144] Use-after-free vulnerability in Atomics Ops Handler
Use-after-free vulnerability in Atomics Ops Handler. Red Hat rates this important (CVSS 6.3). Weakness: CWE-825. 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-2026-1180] Blind Server-Side Request Forgery (SSRF) in Keycloak OIDC Dynamic Client Registration via jwks_uri
Blind Server-Side Request Forgery (SSRF) in Keycloak OIDC Dynamic Client Registration via jwks_uri. Red Hat rates this moderate (CVSS 5.8). Weakness: CWE-918. Affected package(s): rhbk/keycloak-operator-bundle:26.4.11, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9-operator:26.4, rhbk/keycloak-rhel9:26.4. 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.
Low [CVE-2026-1190] Keycloak SAML brokering: Response delay due to unchecked NotOnOrAfter in SubjectConfirmationData
Keycloak SAML brokering: Response delay due to unchecked NotOnOrAfter in SubjectConfirmationData. Red Hat rates this low (CVSS 3.1). Weakness: CWE-112. Affected package(s): rhbk/keycloak-rhel9, rhbk/keycloak-operator-bundle:26.4.10, rhbk/keycloak-rhel9-operator:26.4, rhbk/keycloak-rhel9:26.4. Resolved in Red Hat advisory RHSA-2026:3947 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
High [CVE-2026-23745] Arbitrary file overwrite and symlink poisoning via unsanitized linkpaths in archives
Arbitrary file overwrite and symlink poisoning via unsanitized linkpaths in archives. Red Hat rates this important (CVSS 8.2). Weakness: CWE-22. Affected package(s): network-observability/network-observability-console-plugin-rhel9:1771227650, devspaces/udi-rhel9:1774451954, rhtas/rekor-search-ui-rhel9:1770107452, rhtas/rekor-search-ui-rhel9:1770739056, rhoai/odh-dashboard-rhel9:1779189627, linux-sgx. 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 10; Red Hat Enterprise Linux 9; Red Hat OpenShift AI 2.25; Red Hat OpenShift AI 3.3; and 19 more.
High [CVE-2021-47839] Remote Code Execution via persistent cross-site scripting
Remote Code Execution via persistent cross-site scripting. Red Hat rates this important. Weakness: CWE-79. 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-2026-23490] Denial of Service due to memory exhaustion from malformed RELATIVE-OID
Denial of Service due to memory exhaustion from malformed RELATIVE-OID. Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. Affected package(s): python-pyasn1, ansible-automation-platform, fence-agents, rhelai3/bootc-azure-rocm-rhel9:1778677745, resource-agents, automation-controller. Resolved in Red Hat advisory RHSA-2026:5606 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Ansible Automation Platform 2.5 for RHEL 8; Red Hat Ansible Automation Platform 2.5 for RHEL 9; Red Hat Ansible Automation Platform 2.6 for RHEL 9; Red Hat Enterprise Linux 10.0 Extended Update Support; and 34 more.
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