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-2026-34293] DML unspecified vulnerability (CPU Apr 2026)
DML unspecified vulnerability (CPU Apr 2026). Red Hat rates this moderate (CVSS 4.9). Weakness: CWE-770. Affected package(s): mysql, mysql:8.0. Resolved in Red Hat advisory RHSA-2026:25919 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9.
Medium [CVE-2026-34267] Optimizer unspecified vulnerability (CPU Apr 2026)
Optimizer unspecified vulnerability (CPU Apr 2026). Red Hat rates this moderate (CVSS 4.9). Weakness: CWE-770. Affected package(s): mysql, mysql:8.0. Resolved in Red Hat advisory RHSA-2026:25919 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9.
Medium [CVE-2026-22015] Information Schema unspecified vulnerability (CPU Apr 2026)
Information Schema unspecified vulnerability (CPU Apr 2026). Red Hat rates this moderate (CVSS 4.3). Weakness: CWE-201. Affected package(s): mysql:8.4, mysql, mysql8.4, mysql:8.0. Resolved in Red Hat advisory RHSA-2026:25919 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1.
Medium [CVE-2026-34276] Group Replication Plugin unspecified vulnerability (CPU Apr 2026)
Group Replication Plugin unspecified vulnerability (CPU Apr 2026). Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-770. Affected package(s): mysql:8.4, mysql, mysql8.4, mysql:8.0. Resolved in Red Hat advisory RHSA-2026:25919 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1.
Medium [CVE-2026-5450] Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width
Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width. Red Hat rates this moderate (CVSS 5). Weakness: CWE-131. Affected package(s): glibc, insights-proxy/insights-proxy-container-rhel9:1782890503, glibc-main. Resolved in Red Hat advisory RHSA-2026:33170 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.
Medium [CVE-2026-5928] Information disclosure or denial of service via ungetwc function with specific wide character encodings
Information disclosure or denial of service via ungetwc function with specific wide character encodings. Red Hat rates this moderate (CVSS 5). Weakness: CWE-125. Affected package(s): glibc-main. Resolved in Red Hat advisory RHSA-2026:12740 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-3219] Incorrect file installation due to improper archive handling
Incorrect file installation due to improper archive handling. Red Hat rates this moderate (CVSS 5). Weakness: CWE-1287. Affected package(s): python-pip-main. Resolved in Red Hat advisory RHSA-2026:20074 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-5958] GNU sed TOCTOU race condition
GNU sed TOCTOU race condition. Red Hat rates this moderate (CVSS 6.3). Weakness: CWE-367. Affected package(s): sed-main. Resolved in Red Hat advisory RHSA-2026:10995 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-40253] Information disclosure and Denial of Service via malformed BER-encoded cryptographic objects
Information disclosure and Denial of Service via malformed BER-encoded cryptographic objects. Red Hat rates this moderate (CVSS 6.8). Weakness: CWE-125. Affected package(s): opencryptoki. Resolved in Red Hat advisory RHSA-2026:26352 — 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-2026-27820] Memory corruption via buffer overflow in Zlib::GzipReader
Memory corruption via buffer overflow in Zlib::GzipReader. Red Hat rates this moderate (CVSS 5.6). Weakness: CWE-131. Affected package(s): ruby4, ruby3. Resolved in Red Hat advisory RHSA-2026:7307 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-6732] Denial of Service via crafted XSD-validated document
Denial of Service via crafted XSD-validated document. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-843. Affected package(s): libxml2-main. Resolved in Red Hat advisory RHSA-2026:11503 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-6245] Sssd: out-of-bounds read in the sssd
A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS). This affects Red Hat systems where SSSD is configured and local user access is possible. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-805. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: sssd.
Medium [CVE-2026-4630] Unauthorized resource access and data modification via Insecure Direct Object Reference
Unauthorized resource access and data modification via Insecure Direct Object Reference. Red Hat rates this moderate (CVSS 6.8). Weakness: CWE-639. Affected package(s): rhbk/keycloak-rhel9, rhbk/keycloak-operator-bundle:26.4.12, rhbk/keycloak-rhel9:26.4, rhbk/keycloak-rhel9-operator:26.4. Resolved in Red Hat advisory RHSA-2026:19596 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-5135] Unauthorized modification of host configurations via broken access control
Unauthorized modification of host configurations via broken access control. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-639. Affected package(s): foreman. Resolved in Red Hat advisory RHSA-2026:34366 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.
Medium [CVE-2026-0636] LDAP injection vulnerability in LDAPStoreHelper.java
LDAP injection vulnerability in LDAPStoreHelper.java. Red Hat rates this important (CVSS 6.5). Weakness: CWE-90. Affected package(s): bcprov-jdk15to18, eap8-bouncycastle, devspaces/openvsx-rhel9:1779528224, bcprov-ext-jdk15on, bcprov-ext-jdk18on, devspaces/pluginregistry-rhel9:1779359423. Resolved in Red Hat advisory RHSA-2026:14276 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9; Red Hat OpenShift Dev Spaces 3.28; and 11 more.
Medium [CVE-2026-6313] Insufficient policy enforcement in CORS
Insufficient policy enforcement in CORS. Red Hat rates this important (CVSS 6.8). Weakness: CWE-346. 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-2026-6312] Insufficient policy enforcement in Passwords
Insufficient policy enforcement in Passwords. Red Hat rates this important (CVSS 6.8). Weakness: CWE-346. 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-2026-5713] Information disclosure and arbitrary code execution via remote debugging with a malicious process.
Information disclosure and arbitrary code execution via remote debugging with a malicious process.. Red Hat rates this moderate (CVSS 6). Weakness: CWE-822. Affected package(s): python3, python3.14. Resolved in Red Hat advisory RHSA-2026:19019 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1.
Medium [CVE-2026-35469] Kubelet, CRI-O, kube-apiserver: Denial of Service via SPDY streaming code
Kubelet, CRI-O, kube-apiserver: Denial of Service via SPDY streaming code. Red Hat rates this important (CVSS 6.5). Weakness: CWE-770. Affected package(s): openshift4/ose-node-feature-discovery-rhel9:1779252023, openshift4/ose-sriov-network-config-daemon:1780955979, container-native-virtualization/virt-exportserver-rhel9:1782358244, openshift4/ose-sriov-network-webhook-rhel9:1779249801, advanced-cluster-security/rhacs-roxctl-rhel8:1777986630, multicluster-engine/assisted-service. Resolved in Red Hat advisory RHSA-2026:29795 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: RHEM 1.0 for RHEL 9; Red Hat OpenShift Container Platform 4.19; Red Hat Advanced Cluster Management for Kubernetes 2.13; Red Hat Advanced Cluster Security for Kubernetes 4.10; and 32 more.
Medium [CVE-2026-39956] missing runtime type checks for _strindices lead to crash and limited memory disclosure
missing runtime type checks for _strindices lead to crash and limited memory disclosure. Red Hat rates this moderate (CVSS 6.1). Weakness: CWE-1287. Affected package(s): jq-main. Resolved in Red Hat advisory RHSA-2026:8579 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.