Red Hat Linux Security Advisories & Vulnerabilities
16036 advisories tracked · Red Hat Security Data API · direct feeds checked every minute; rate-limited sources checked less often
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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
High [CVE-2026-33079] Regular Expression Denial of Service (ReDoS) via crafted Markdown input
Regular Expression Denial of Service (ReDoS) via crafted Markdown input. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1333. 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 OpenShift AI (RHOAI); Red Hat Migration Toolkit for Applications 8.2; Red Hat OpenShift AI 3.4.
High [CVE-2026-5081] Apache::Session::Generate::ModUniqueId: Perl: mod_unique_id: Apache HTTP Server: Apache::Session::Generate::ModUniqueId: Session ID predictability allows unauthorized access
Apache::Session::Generate::ModUniqueId: Perl: mod_unique_id: Apache HTTP Server: Apache::Session::Generate::ModUniqueId: Session ID predictability allows unauthorized access. Red Hat rates this important (CVSS 8.2). Weakness: CWE-341. 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-2026-43116] ensure safe access to master conntrack
ensure safe access to master conntrack. Red Hat rates this moderate (CVSS 7). Weakness: CWE-416. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:26462 — 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.
High [CVE-2026-43110] validate bsscfg indices in IF events
validate bsscfg indices in IF events. Red Hat rates this moderate (CVSS 7.5). Weakness: CWE-1285. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:26462 — 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 7; Red Hat Enterprise Linux 1.
High [CVE-2026-43112] fix out-of-bounds read in cifs_sanitize_prepath
fix out-of-bounds read in cifs_sanitize_prepath. Red Hat rates this important (CVSS 8.1). Weakness: CWE-125. Affected package(s): kernel. Resolved in Red Hat advisory RHSA-2026:34911 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat OpenShift Container Platform 4.22; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; and 14 more.
High [CVE-2026-43260] Fix RSS context delete logic
Fix RSS context delete logic. Red Hat rates this moderate (CVSS 7.3). Weakness: CWE-772. Affected package(s): kernel. Resolved in Red Hat advisory RHSA-2026:27288 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1.
High [CVE-2026-43178] fix possible double mmput() in do_procmap_query()
fix possible double mmput() in do_procmap_query(). Red Hat rates this important (CVSS 7). 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.
High [CVE-2026-43198] fix potential race in tcp_v6_syn_recv_sock()
fix potential race in tcp_v6_syn_recv_sock(). Red Hat rates this important (CVSS 7). Weakness: CWE-821. Affected package(s): kernel. 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 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 7 more.
High [CVE-2026-43114] don't return non-matching entry on expiry
don't return non-matching entry on expiry. Red Hat rates this important (CVSS 8.1). Weakness: CWE-480. 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 10.0 Extended Update Support; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat OpenShift Container Platform 4.22; and 3 more.
High [CVE-2026-43077] algif_aead - Fix minimum RX size check for decryption
algif_aead - Fix minimum RX size check for decryption. Red Hat rates this moderate (CVSS 7.1). Weakness: CWE-131. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:13936 — 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.
High [CVE-2026-43190] check remaining length before reading optlen
check remaining length before reading optlen. Red Hat rates this moderate (CVSS 7.5). Weakness: CWE-125. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:26462 — 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 7; Red Hat Enterprise Linux 1.
High [CVE-2026-43133] Always use vmcb01 in VMLOAD/VMSAVE emulation
Always use vmcb01 in VMLOAD/VMSAVE emulation. Red Hat rates this important (CVSS 7.9). Weakness: CWE-628. 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 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.
High [CVE-2026-43128] Fix double dma_buf_unpin in failure path
Fix double dma_buf_unpin in failure path. Red Hat rates this moderate (CVSS 7). Weakness: CWE-911. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:19569 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9.
High [CVE-2026-43158] fix freemap adjustments when adding xattrs to leaf blocks
fix freemap adjustments when adding xattrs to leaf blocks. Red Hat rates this moderate (CVSS 7). Weakness: CWE-617. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:26462 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
High [CVE-2026-43125] validate length in dlm_search_rsb_tree
validate length in dlm_search_rsb_tree. Red Hat rates this important (CVSS 7). Weakness: CWE-130. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:25120 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; and 4 more.
Medium [CVE-2026-6420] Security bypass due to hardcoded TPM quote nonce
Security bypass due to hardcoded TPM quote nonce. Red Hat rates this moderate (CVSS 6.3). Weakness: CWE-1241. Affected package(s): keylime. Resolved in Red Hat advisory RHSA-2026:28582 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9.
Medium [CVE-2026-6860] Denial of Service via TLS handshake with wildcard server name
Denial of Service via TLS handshake with wildcard server name. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-770. Affected package(s): rhbk/keycloak-operator-bundle:26.4.13, rhbk/keycloak-rhel9-operator:26.4, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9-operator, rhbk/keycloak-rhel9:26.6, rhbk/keycloak-rhel9:26.4. 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-2026-43163] fix GPF in write_page caused by resize race
fix GPF in write_page caused by resize race. Red Hat rates this moderate (CVSS 4.7). Weakness: CWE-825. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:21745 — 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-2026-43205] Linux kernel dpaa2-switch: Kernel memory corruption via out-of-bounds write
Linux kernel dpaa2-switch: Kernel memory corruption via out-of-bounds write. Red Hat rates this moderate (CVSS 6.7). Weakness: CWE-787. Affected package(s): kernel. Resolved in Red Hat advisory RHSA-2026:21557 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1.
Medium [CVE-2026-43279] Add sanity check for OOB writes at silencing
Add sanity check for OOB writes at silencing. Red Hat rates this moderate (CVSS 5.8). Weakness: CWE-787. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:27354 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 8.
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