Red Hat Linux Security Advisories & Vulnerabilities
16013 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
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.
High [CVE-2026-47102] Privilege escalation through user role modification
Privilege escalation through user role modification. Red Hat rates this important (CVSS 8.8). Weakness: CWE-915. 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-2026-47101] Privilege escalation via API key generation with insufficient permission validation
Privilege escalation via API key generation with insufficient permission validation. Red Hat rates this important (CVSS 8.8). Weakness: CWE-639. 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-2026-5946] 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 Hardened Images; and 5 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 Hardened Images; Red Hat Enterprise Linux 6; and 4 more.
High [CVE-2026-5947] SIG(0) validation during query flood may lead to undefined behavior
SIG(0) validation during query flood may lead to undefined behavior. Red Hat rates this important (CVSS 7.5). Weakness: CWE-367. Affected package(s): bind-main. Resolved in Red Hat advisory RHSA-2026:7412 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: BIND 9; Red Hat Hardened Images.
High [CVE-2026-3593] Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation
Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation. Red Hat rates this important (CVSS 7.4). Weakness: CWE-825. Affected package(s): bind-main. Resolved in Red Hat advisory RHSA-2026:7412 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Hardened Images.
High [CVE-2026-43494] reset op_nents when zerocopy page pin fails
reset op_nents when zerocopy page pin fails. 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-2026-43501] 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.
Critical [CVE-2026-8631] Arbitrary code execution and privilege escalation via integer overflow in hpcups
A potential security vulnerability has been identified in the HP Linux Imaging and Printing Software. This potential vulnerability may allow escalation of privileges and/or arbitrary code execution via an integer overflow in the hpcups processing path when handling crafted print data. A remote attacker who can submit print job content to the hpcups filter path may achieve arbitrary code execution or privilege escalation on systems using HPLIP for printing. Red Hat severity: Important — CVSS 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-190. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; 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; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; Red Hat Enterprise Linux 9; 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; Red Hat Enterprise Linux 6.
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 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions; and 8 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.
High [CVE-2026-44390] Denial of Service due to excessive resource consumption with large DNS Resource Record Sets
Denial of Service due to excessive resource consumption with large DNS Resource Record Sets. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1050. 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 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; and 3 more.
High [CVE-2026-42534] Denial of Service due to degraded resolution performance in jostle logic
Denial of Service due to degraded resolution performance in jostle logic. Red Hat rates this important (CVSS 7.5). Weakness: CWE-911. 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 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; and 3 more.
High [CVE-2026-41292] Denial of Service via excessive EDNS options
Denial of Service via excessive EDNS options. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1050. 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 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; and 6 more.
High [CVE-2026-9064] unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS)
unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS). Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. Affected package(s): 389-ds-base, 389-ds:1.4, redhat-ds:11, redhat-ds:12, dirsrv/dirsrv-container-rhel10:1781714123. Resolved in Red Hat advisory RHSA-2026:26463 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Directory Server 11.5 E4S for RHEL 8; Red Hat Directory Server 11.7 E4S for RHEL 8; Red Hat Directory Server 11.9 for RHEL 8; Red Hat Directory Server 12.2 E4S for RHEL 9; and 13 more.
High [CVE-2026-47783] Username enumeration via timing side channel
Username enumeration via timing side channel. Red Hat rates this important (CVSS 8.1). Weakness: CWE-208. Affected package(s): memcached. Resolved in Red Hat advisory RHSA-2026:27862 — 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 Enterprise Linux 6; Red Hat Enterprise Linux 7; and 2 more.
High [CVE-2026-43618] Remote memory disclosure via integer overflow in compressed-token decoding
Remote memory disclosure via integer overflow in compressed-token decoding. Red Hat rates this important (CVSS 8.1). Weakness: CWE-190. Affected package(s): rsync, discovery/discovery-ui-rhel9:1782166952. Resolved in Red Hat advisory RHSA-2026:26410 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux AppStream (v. 9); Red Hat Enterprise Linux BaseOS (v. 10); Red Hat Enterprise Linux BaseOS (v. 8); and 8 more.
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