Red Hat Linux Security Advisories & CVEs
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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-2026-33217] Access control bypass via unapplied ACLs in MQTT namespace
Access control bypass via unapplied ACLs in MQTT namespace. Red Hat rates this important (CVSS 8.1). Weakness: CWE-425. Affected package(s): multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1780167118, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439. Resolved in Red Hat advisory RHSA-2026:21769 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat multicluster global hub 1.4.3; Red Hat multicluster global hub 1.5.2; Red Hat multicluster global hub 1.4.4; Red Hat multicluster global hub 1.6.0; and 4 more.
High [CVE-2026-33216] Information disclosure of MQTT passwords through monitoring endpoints
Information disclosure of MQTT passwords through monitoring endpoints. Red Hat rates this important (CVSS 8.6). Weakness: CWE-213. Affected package(s): multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1780167118, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439. Resolved in Red Hat advisory RHSA-2026:21769 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat multicluster global hub 1.4.3; Red Hat multicluster global hub 1.5.2; Red Hat multicluster global hub 1.4.4; Red Hat multicluster global hub 1.6.0; and 4 more.
High [CVE-2026-29785] Denial of Service via leafnode compression
Denial of Service via leafnode compression. Red Hat rates this important (CVSS 7.5). Weakness: CWE-409. Affected package(s): multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1780167118, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439. Resolved in Red Hat advisory RHSA-2026:21769 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat multicluster global hub 1.4.3; Red Hat multicluster global hub 1.5.2; Red Hat multicluster global hub 1.4.4; Red Hat multicluster global hub 1.6.0; and 4 more.
High [CVE-2026-27889] Denial of Service via malformed WebSockets frame
Denial of Service via malformed WebSockets frame. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1286. Affected package(s): multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1780167118, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439. Resolved in Red Hat advisory RHSA-2026:21769 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat multicluster global hub 1.4.3; Red Hat multicluster global hub 1.5.2; Red Hat multicluster global hub 1.4.4; Red Hat multicluster global hub 1.6.0; and 4 more.
High [CVE-2026-3104] Denial of Service via specially crafted domain query causing a memory leak
Denial of Service via specially crafted domain query causing a memory leak. Red Hat rates this important (CVSS 7.5). Weakness: CWE-772. Affected package(s): bind-main. Resolved in Red Hat advisory RHSA-2026:6935 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: BIND 9; Red Hat Hardened Images.
High [CVE-2026-1519] Denial of Service via maliciously crafted DNSSEC-validated zone
Denial of Service via maliciously crafted DNSSEC-validated zone. Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. Affected package(s): bind, bind9.16, bind9.18, rhcos, bind-main. Resolved in Red Hat advisory RHSA-2026:29863 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: BIND 9; 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 19 more.
High [CVE-2026-3608] Denial of Service via maliciously crafted message
Denial of Service via maliciously crafted message. Red Hat rates this important (CVSS 7.5). Weakness: CWE-617. Affected package(s): kea. Resolved in Red Hat advisory RHSA-2026:7342 — update the affected packages (`sudo dnf update`). Affected product named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support.
High [CVE-2026-23375] deny THP for files on anonymous inodes
deny THP for files on anonymous inodes. Red Hat rates this moderate (CVSS 7). Weakness: CWE-825. 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.
High [CVE-2025-67030] org.codehaus.plexus:plexus-utils: Plexus-utils: Directory Traversal in extractFile method
org.codehaus.plexus:plexus-utils: Plexus-utils: Directory Traversal in extractFile method. Red Hat rates this important (CVSS 8.3). Weakness: CWE-22. Affected package(s): eap8-jboss-logging, eap8-guava-failureaccess, eap8-activemq-artemis, eap8-netty-transport-native-epoll, eap8-reactivex-rxjava, eap8-wildfly-javadocs. Resolved in Red Hat advisory RHSA-2026:7109 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat JBoss EAP 8.1 for RHEL 8; Red Hat JBoss EAP 8.1 for RHEL 9; Red Hat Enterprise Linux AppStream EUS (v. 10.0); Red Hat Enterprise Linux AppStream (v. 10); and 44 more.
High [CVE-2026-23392] release flowtable after rcu grace period on error
release flowtable after rcu grace period on error. Red Hat rates this moderate (CVSS 7). Weakness: CWE-825. 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 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1.
High [CVE-2026-4371] Out of bounds read in IMAP parsing
Out of bounds read in IMAP parsing. Red Hat rates this important (CVSS 8.2). Weakness: CWE-130. Affected package(s): thunderbird. Resolved in Red Hat advisory RHSA-2026:8286 — 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 8.2 Advanced 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 9 more.
High [CVE-2026-33412] Arbitrary code execution via command injection in glob() function
Arbitrary code execution via command injection in glob() function. Red Hat rates this important (CVSS 7.3). Weakness: CWE-78. Affected package(s): rhcos, rhaiis/vllm-rocm-rhel9:1778244531, rhui5/cds-kubernetes-tp-rhel9:1777459441, rhui5/haproxy-rhel9:1776868744, rhui5/installer-rhel9:1776868772, vim. Resolved in Red Hat advisory RHSA-2026:6915 — 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 6 Extended Lifecycle Support - EXTENSION; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; and 23 more.
High [CVE-2026-32647] Denial of Service or Code Execution via specially crafted MP4 files
Denial of Service or Code Execution via specially crafted MP4 files. Red Hat rates this important (CVSS 7.8). Weakness: CWE-125. Affected package(s): nginx-main, nginx, nginx:1.26, nginx:1.24, rhui5/cds-rhel9:1776868774, rhui5/rhua-rhel9:1776868842. Resolved in Red Hat advisory RHSA-2026:6906 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: NGINX Open Source; NGINX Plus; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8; and 7 more.
High [CVE-2026-4775] Arbitrary code execution or denial of service via signed integer overflow in TIFF file processing
Arbitrary code execution or denial of service via signed integer overflow in TIFF file processing. Red Hat rates this important (CVSS 7.8). Weakness: CWE-190. Affected package(s): libtiff-main, rhaiis/model-opt-cuda-rhel9:1782352950, rhaiis/vllm-spyre-rhel9:1782352919, compat-libtiff3, libtiff, mingw-libtiff. Resolved in Red Hat advisory RHSA-2026:30349 — 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 14 more.
High [CVE-2026-27651] Denial of Service via undisclosed requests when ngx_mail_auth_http_module is enabled
Denial of Service via undisclosed requests when ngx_mail_auth_http_module is enabled. Red Hat rates this important (CVSS 7.5). Weakness: CWE-476. Affected package(s): nginx-main, nginx, nginx:1.26, nginx:1.24, rhui5/cds-rhel9:1776868774, rhui5/rhua-rhel9:1776868842. Resolved in Red Hat advisory RHSA-2026:6906 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: NGINX Open Source; NGINX Plus; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8; and 6 more.
High [CVE-2026-27654] Denial of Service or file modification via buffer overflow in ngx_http_dav_module
Denial of Service or file modification via buffer overflow in ngx_http_dav_module. Red Hat rates this important (CVSS 8.2). Weakness: CWE-120. Affected package(s): nginx-main, nginx, nginx:1.26, nginx:1.24, rhui5/cds-rhel9:1776868774, rhui5/rhua-rhel9:1776868842. Resolved in Red Hat advisory RHSA-2026:6906 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: NGINX Open Source; NGINX Plus; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8; and 6 more.
High [CVE-2026-27784] Denial of Service due to memory corruption via crafted MP4 file
Denial of Service due to memory corruption via crafted MP4 file. Red Hat rates this important (CVSS 7.5). Weakness: CWE-190. Affected package(s): nginx-main, nginx, nginx:1.26, nginx:1.24, rhui5/cds-rhel9:1776868774, rhui5/rhua-rhel9:1776868842. Resolved in Red Hat advisory RHSA-2026:6906 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: NGINX Open Source; 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; and 5 more.
High [CVE-2026-4721] Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149
Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — 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 10 more.
High [CVE-2026-4729] Memory safety bugs fixed in Firefox 149 and Thunderbird 149
Memory safety bugs fixed in Firefox 149 and Thunderbird 149. Red Hat rates this important (CVSS 7.5). 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.
High [CVE-2026-4720] Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149
Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149. Red Hat rates this important (CVSS 7.5). Weakness: CWE-120. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:6917 — 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 10 more.