Red Hat Linux Red Hat Enterprise Linux Vulnerabilities & Security Advisories
1263 advisories tracked · Red Hat Security Data API · 3 listed in the CISA Known Exploited Vulnerabilities catalog
Every row below is a published Red Hat Linux advisory that VulniPulse classified as Red Hat Enterprise Linux, with the CVEs, affected and fixed releases and exploitation status the vendor stated. Severity mix: 31 critical, 814 high, 398 medium, 17 low.
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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 Linux Red Hat Enterprise Linux advisories
High [CVE-2026-40033] Remote code execution via heap-buffer-overflow in gdi_CacheToSurface
Remote code execution via heap-buffer-overflow in gdi_CacheToSurface. Red Hat rates this important (CVSS 8.8). Weakness: CWE-787. 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: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-42496] Path traversal via crafted symlinks allows arbitrary file access
Path traversal via crafted symlinks allows arbitrary file access. Red Hat rates this important (CVSS 8.2). Weakness: CWE-22. Affected package(s): perl:5.32, perl-Archive-Tar. Resolved in Red Hat advisory RHSA-2026:30852 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-46243] Linux kernel: smb: client: reject userspace cifs.spnego descriptions
Linux kernel: smb: client: reject userspace cifs.spnego descriptions. Red Hat rates this important (CVSS 7.8). Weakness: CWE-825. Affected package(s): kernel, kernel-rt, rhcos, kpatch-patch. Resolved in Red Hat advisory RHSA-2026:33219 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: NVIDIA for RHEL 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION; Red Hat Enterprise Linux 7 Extended Lifecycle Support; and 18 more.
High [CVE-2026-43503] propagate shared-frag marker through frag-transfer helpers
propagate shared-frag marker through frag-transfer helpers. Red Hat rates this important (CVSS 7). Weakness: CWE-664. Affected package(s): rhcos, kernel-rt, kernel, kpatch-patch. Resolved in Red Hat advisory RHSA-2026:23470 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: NVIDIA for RHEL 10; Red Hat Enterprise Linux 10.0 Extended Update 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 17 more.
High [CVE-2026-39821] Privilege escalation via incorrect Punycode label processing
Privilege escalation via incorrect Punycode label processing. Red Hat rates this important (CVSS 8.2). Weakness: CWE-1289. Affected package(s): rhacm2/observatorium-rhel9:1782157471, rhacm2/prometheus-alertmanager-rhel9:1782156920, cluster-observability-operator/distributed-tracing-console-plugin-pf4-rhel9:1782840519, rhacm2/thanos-rhel9:1782465412, rhacm2/grafana-dashboard-loader-rhel9:1782383255, rhacm2/acm-prometheus-config-reloader-rhel9:1782157632. Resolved in Red Hat advisory RHSA-2026:35830 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat OpenShift Container Platform 4.22; RHEM 1.0 for RHEL 9; Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux AppStream (v. 8); and 92 more.
High [CVE-2026-9256] code execution and denial of service
code execution and denial of service. Red Hat rates this important (CVSS 8.1). Weakness: CWE-122. Affected package(s): nginx, nginx:1.26, nginx-main, nginx:1.24, discovery/discovery-ui-rhel9:1782756541. Resolved in Red Hat advisory RHSA-2026:29874 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: NGINX Plus; NGINX Open Source; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; and 5 more.
High [CVE-2026-9277] Arbitrary code execution via command injection due to unescaped line terminators
Arbitrary code execution via command injection due to unescaped line terminators. Red Hat rates this important (CVSS 8.1). Weakness: CWE-78. Affected package(s): openshift4/ose-console-rhel9:1782308675, cluster-observability-operator/troubleshooting-panel-console-plugin-pf6-rhel9:1782839996, cluster-observability-operator/distributed-tracing-console-plugin-pf5-rhel9:1782839981, openshift-service-mesh/kiali-rhel9:1780916345, cluster-observability-operator/distributed-tracing-console-plugin-pf4-rhel9:1782840519, quay/quay-rhel8:1781878070. Resolved in Red Hat advisory RHSA-2026:26077 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Cryostat 4 on RHEL 9; Red Hat Developer Hub 1.10; Red Hat Developer Hub 1.9; Red Hat Discovery 2; and 26 more.
High [CVE-2026-39829] Denial of Service via crafted public key with excessive parameters
Denial of Service via crafted public key with excessive parameters. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1284. Affected package(s): advanced-cluster-security/rhacs-roxctl-rhel8:1781686458, advanced-cluster-security/rhacs-roxctl-rhel8:1781686446, buildah. Resolved in Red Hat advisory RHSA-2026:29455 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: RHEM 1.0 for RHEL 9; Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux AppStream (v. 8); Red Hat Enterprise Linux AppStream (v. 9); and 45 more.
High [CVE-2026-39830] Denial of Service via resource leak from unsolicited SSH responses
Denial of Service via resource leak from unsolicited SSH responses. Red Hat rates this important (CVSS 7.5). Weakness: CWE-772. Affected package(s): buildah. Resolved in Red Hat advisory RHSA-2026:29455 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: RHEM 1.0 for RHEL 9; Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux AppStream (v. 8); Red Hat Enterprise Linux AppStream (v. 9); and 45 more.
High [CVE-2026-42508] Revocation bypass via unchecked SignatureKey
Revocation bypass via unchecked SignatureKey. Red Hat rates this important (CVSS 7.4). Weakness: CWE-295. Affected package(s): golang1, advanced-cluster-security/rhacs-main-rhel8:1781686446, advanced-cluster-security/rhacs-main-rhel8:1781686458. Resolved in Red Hat advisory RHSA-2026:23262 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: RHEM 1.0 for RHEL 9; Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux AppStream (v. 8); Red Hat Enterprise Linux AppStream (v. 9); and 34 more.
High [CVE-2026-46595] Authorization bypass due to skipped source-address validation
Authorization bypass due to skipped source-address validation. Red Hat rates this important (CVSS 7.1). Weakness: CWE-303. Affected package(s): multicluster-engine/addon-manager-rhel9:1782160196, multicluster-engine/registration-operator-rhel9:1782160210, rhelai3/bootc-azure-cuda-rhel9:1782758410, golang1, multicluster-engine/work-rhel9:1782159773, multicluster-engine/kube-rbac-proxy-mce-rhel9:1782477094. Resolved in Red Hat advisory RHSA-2026:23262 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: RHEM 1.0 for RHEL 9; Red Hat Advanced Cluster Management for Kubernetes 2.13; Red Hat Advanced Cluster Security for Kubernetes 4.10; Red Hat Advanced Cluster Security for Kubernetes 4.11; and 37 more.
High [CVE-2026-39835] Denial of Service via crafted SSH certificate
Denial of Service via crafted SSH certificate. Red Hat rates this important (CVSS 7.5). Weakness: CWE-476. Affected package(s): advanced-cluster-security/rhacs-roxctl-rhel8:1781686458, advanced-cluster-security/rhacs-scanner-v4-rhel8:1781686458, advanced-cluster-security/rhacs-roxctl-rhel8:1781686446, advanced-cluster-security/rhacs-scanner-v4-rhel8:1781686446, advanced-cluster-security/rhacs-main-rhel8:1781686446, advanced-cluster-security/rhacs-main-rhel8:1781686458. Resolved in Red Hat advisory RHSA-2026:26547 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: RHEM 1.0 for RHEL 9; Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux AppStream (v. 8); Red Hat Enterprise Linux AppStream (v. 9); and 43 more.
High [CVE-2026-39832] Security bypass due to improper handling of key restrictions
Security bypass due to improper handling of key restrictions. Red Hat rates this important (CVSS 8.7). Weakness: CWE-281. 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: RHEM 1.0 for RHEL 9; Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux AppStream (v. 8); Red Hat Enterprise Linux AppStream (v. 9); and 35 more.
High [CVE-2026-39828] Unauthorized command execution via discarded SSH permissions
Unauthorized command execution via discarded SSH permissions. Red Hat rates this important (CVSS 8.8). Weakness: CWE-281. Affected package(s): advanced-cluster-security/rhacs-roxctl-rhel8:1781686458, advanced-cluster-security/rhacs-roxctl-rhel8:1781686446. Resolved in Red Hat advisory RHSA-2026:26547 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: RHEM 1.0 for RHEL 9; Red Hat Advanced Cluster Security for Kubernetes 4.10; Red Hat Advanced Cluster Security for Kubernetes 4.11; Red Hat Advanced Cluster Security for Kubernetes 4.9; and 38 more.
High [CVE-2026-5946] Denial of Service via specially crafted DNS messages
Denial of Service via specially crafted DNS messages. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1287. Affected package(s): bind9.16, bind-main, bind9.18, bind. Resolved in Red Hat advisory RHSA-2026:23360 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: BIND 9; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; and 4 more.
High [CVE-2026-3039] BIND 9 server memory exhaustion during GSS-API TKEY negotiation
BIND 9 server memory exhaustion during GSS-API TKEY negotiation. Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. Affected package(s): bind9.16, bind-main, bind9.18, bind. Resolved in Red Hat advisory RHSA-2026:23360 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; and 3 more.
High [CVE-2026-43501] reserve mac_len headroom when recompressed SRH grows
reserve mac_len headroom when recompressed SRH grows. Red Hat rates this important (CVSS 7.5). Weakness: CWE-131. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:34094 — 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 9.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support.
High [CVE-2026-8632] Privilege escalation and arbitrary code execution via operating system command injection
Privilege escalation and arbitrary code execution via operating system command injection. Red Hat rates this important (CVSS 7.8). Weakness: CWE-78. Affected package(s): hplip. Resolved in Red Hat advisory RHSA-2026:26297 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 10.0 Extended Update Support; and 3 more.
High [CVE-2026-33278] Unbound DNSSEC Validator Use-After-Free via Deep Copy Pointer Overwrite Leading to DoS and Possible Remote Code Execution
Unbound DNSSEC Validator Use-After-Free via Deep Copy Pointer Overwrite Leading to DoS and Possible Remote Code Execution. Red Hat rates this important (CVSS 8.1). Weakness: CWE-416. Affected package(s): unbound-main, unbound. Resolved in Red Hat advisory RHSA-2026:23231 — 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 Hardened Images; Red Hat OpenShift Container Platform 4.
High [CVE-2026-42944] Heap overflow and crash with multiple nsid, cookie, padding EDNS options
Heap overflow and crash with multiple nsid, cookie, padding EDNS options. Red Hat rates this important (CVSS 7.5). Affected package(s): unbound-main, unbound. Resolved in Red Hat advisory RHSA-2026:23231 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; and 3 more.