Red Hat Linux Security Advisories & CVEs
3200 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
Medium [CVE-2026-9943] Out of bounds read in WebGL
Out of bounds read in WebGL. Red Hat rates this important (CVSS 6.5). Weakness: CWE-125. 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-2026-46037] validate reply type before using icmp_pointers
validate reply type before using icmp_pointers. Red Hat rates this moderate (CVSS 5.5). Weakness: CWE-1285. Affected package(s): rhcos. Resolved in Red Hat advisory RHSA-2026:25044 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-48710] Security restriction bypass via malformed HTTP Host header
Security restriction bypass via malformed HTTP Host header. Red Hat rates this critical (CVSS 6.5). Weakness: CWE-1289. Affected package(s): rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9:1782132660, rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9:1782133865, rhoai/odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-rhel9:1782132444, satellite/iop-host-inventory-rhel9:1780414237, satellite/foreman-mcp-server-rhel9:1780492012, rhoai/odh-trustyai-nemo-guardrails-server-rhel9:1782420349. Resolved in Red Hat advisory RHSA-2026:34526 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat AI Inference Server 3.3; Red Hat Ansible Automation Platform 2.6; Red Hat Ansible Automation Platform 2.7; Red Hat OpenShift AI 3.3; and 8 more.
Medium [CVE-2026-3592] Amplification vulnerabilities via self-pointed glue records
Amplification vulnerabilities via self-pointed glue records. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-770. Affected package(s): bind-main. Resolved in Red Hat advisory RHSA-2026:20334 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-5950] Unbounded resend loop in BIND 9 resolver
Unbounded resend loop in BIND 9 resolver. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-835. Affected package(s): bind-main. Resolved in Red Hat advisory RHSA-2026:20334 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-32792] Packet of death with DNSCrypt
Packet of death with DNSCrypt. Red Hat rates this moderate (CVSS 5.9). Affected package(s): unbound-main. Resolved in Red Hat advisory RHSA-2026:20357 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-9358] Denial of Service via uncontrolled recursion in AST Serialization
Denial of Service via uncontrolled recursion in AST Serialization. Red Hat rates this moderate (CVSS 4.3). Weakness: CWE-674. Affected package(s): rust-main. Resolved in Red Hat advisory RHSA-2026:22934 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-42506] Cross-Site Scripting (XSS) via arbitrary HTML parsing
Cross-Site Scripting (XSS) via arbitrary HTML parsing. Red Hat rates this moderate (CVSS 5.4). Weakness: CWE-79. Affected package(s): cluster-observability-operator/distributed-tracing-console-plugin-pf6-rhel9:1782839193, cluster-observability-operator/distributed-tracing-console-plugin-rhel9:1782838753, cluster-observability-operator/logging-console-plugin-pf4-rhel9:1782839279, cluster-observability-operator/monitoring-console-plugin-pf5-rhel9:1782844225, cluster-observability-operator/distributed-tracing-console-plugin-pf5-rhel9:1782839981, cluster-observability-operator/monitoring-console-plugin-pf6-rhel9:1782839658. Resolved in Red Hat advisory RHSA-2026:34342 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-25680] Denial of Service due to excessive HTML parsing
Denial of Service due to excessive HTML parsing. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-1050. Affected package(s): cluster-observability-operator/distributed-tracing-console-plugin-pf6-rhel9:1782839193, cluster-observability-operator/distributed-tracing-console-plugin-rhel9:1782838753, cluster-observability-operator/logging-console-plugin-pf4-rhel9:1782839279, cluster-observability-operator/monitoring-console-plugin-pf5-rhel9:1782844225, cluster-observability-operator/distributed-tracing-console-plugin-pf5-rhel9:1782839981, cluster-observability-operator/monitoring-console-plugin-pf6-rhel9:1782839658. Resolved in Red Hat advisory RHSA-2026:34342 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-9150] Stack-based buffer overflow in libsolv's Debian metadata parser when handling SHA384/SHA512 checksums
Stack-based buffer overflow in libsolv's Debian metadata parser when handling SHA384/SHA512 checksums. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-121. Affected package(s): libsolv, libsolv-main. Resolved in Red Hat advisory RHSA-2026:28236 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Hardened Images; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 9; and 3 more.
Medium [CVE-2026-9149] Heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file
Heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted.solv file. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-122. Affected package(s): libsolv, libsolv-main. Resolved in Red Hat advisory RHSA-2026:28236 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Hardened Images; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; and 4 more.
Medium [CVE-2026-9087] Cross-Session Email Verification Proof Not Bound to Upstream Identity in First-Broker-Login
Cross-Session Email Verification Proof Not Bound to Upstream Identity in First-Broker-Login. Red Hat rates this moderate (CVSS 6.4). Weakness: CWE-639. Affected package(s): rhbk/keycloak-operator-bundle:26.4.13, rhbk/keycloak-rhel9-operator:26.4, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9:26.4, rhbk/keycloak-operator-bundle:26.6.3, rhbk/keycloak-rhel9:26.6. Resolved in Red Hat advisory RHSA-2026:30049 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat build of Keycloak 26.4; Red Hat build of Keycloak 26.6.
Medium [CVE-2026-44608] Denial of Service due to locking inconsistency during RPZ XFR reload
Denial of Service due to locking inconsistency during RPZ XFR reload. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-367. Affected package(s): unbound-main. Resolved in Red Hat advisory RHSA-2026:19752 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-47784] Information disclosure via timing side channel
Information disclosure via timing side channel. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-208. Affected package(s): memcached-main. Resolved in Red Hat advisory RHSA-2026:23261 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-42960] Unbound DNS Cache Poisoning via Promiscuous Additional Section RRSet Acceptance
Unbound DNS Cache Poisoning via Promiscuous Additional Section RRSet Acceptance. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-349. Affected package(s): unbound-main. Resolved in Red Hat advisory RHSA-2026:20357 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-42923] Unbound DNSSEC Validator NSEC3 Hash Calculation Limit Bypass via Negative Cache Code Path Leading to DoS
Unbound DNSSEC Validator NSEC3 Hash Calculation Limit Bypass via Negative Cache Code Path Leading to DoS. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-400. Affected package(s): unbound-main. Resolved in Red Hat advisory RHSA-2026:20357 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-9799] Unauthorized access to resources via UMA permission ticket bypass
Unauthorized access to resources via UMA permission ticket bypass. Red Hat rates this moderate (CVSS 4.6). Weakness: CWE-639. Affected package(s): rhbk/keycloak-operator-bundle:26.4.13, rhbk/keycloak-rhel9-operator:26.4, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9:26.6, rhbk/keycloak-rhel9:26.4, rhbk/keycloak-operator-bundle:26.6.4. Resolved in Red Hat advisory RHSA-2026:30049 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-8974] Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151
Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151. Red Hat rates this moderate (CVSS 6.1). Weakness: CWE-787. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:26551 — 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; Red Hat Enterprise Linux 7.
Medium [CVE-2026-8959] Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. Red Hat rates this moderate (CVSS 6.1). Weakness: CWE-653. Affected package(s): thunderbird. Resolved in Red Hat advisory RHSA-2026:21381 — 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-2026-8958] Information disclosure, sandbox escape in the Security: Process Sandboxing component
Information disclosure, sandbox escape in the Security: Process Sandboxing component. Red Hat rates this moderate (CVSS 6.1). Weakness: CWE-403. Affected package(s): thunderbird, firefox. Resolved in Red Hat advisory RHSA-2026:26551 — 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; Red Hat Enterprise Linux 7.