Red Hat Linux Security Advisories & Vulnerabilities
16040 advisories tracked · Red Hat Security Data API · direct feeds checked every minute; rate-limited sources checked less often
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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-2026-33252] Remote tool execution via cross-site request forgery
Remote tool execution via cross-site request forgery. Red Hat rates this moderate (CVSS 7.1). Weakness: CWE-940. Affected package(s): devspaces/udi-rhel9:1779829736. Resolved in Red Hat advisory RHSA-2026:21772 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
High [CVE-2026-33195] Active Storage (Rails): Arbitrary file access via path traversal in blob keys
Active Storage (Rails): Arbitrary file access via path traversal in blob keys. Red Hat rates this important (CVSS 8.1). Weakness: CWE-22. 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 3scale API Management Platform 2.
High [CVE-2026-29111] Arbitrary code execution or Denial of Service via spurious IPC API call data
Arbitrary code execution or Denial of Service via spurious IPC API call data. Red Hat rates this moderate (CVSS 7.8). Weakness: CWE-1287. Affected package(s): systemd, rhosdt/opentelemetry-collector-rhel9:1778056267, rhui5/haproxy-rhel9:1779798164, rhosdt/opentelemetry-rhel9-operator:1778056233, rhui5/rhua-rhel9:1779798222, insights-proxy/insights-proxy-container-rhel9:1780420428. Resolved in Red Hat advisory RHSA-2026:14162 — 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-2026-4601] Private Key Recovery via Missing Cryptographic Step in DSA Signing
Private Key Recovery via Missing Cryptographic Step in DSA Signing. Red Hat rates this important (CVSS 8.7). Weakness: CWE-325. Affected package(s): migration-toolkit-virtualization/mtv-console-plugin-rhel9:1779139872, quay/quay-rhel8:1775169155, quay/quay-rhel8:1775253092, quay/quay-rhel9:1779204086, migration-toolkit-virtualization/mtv-console-plugin-rhel9:1778927462, quay/quay-rhel8:1775169219. Resolved in Red Hat advisory RHSA-2026:6926 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Quay 3.10; Red Hat Quay 3.12; Red Hat Quay 3.15; Red Hat Quay 3.16; and 1 more.
High [CVE-2026-4598] Denial of Service via infinite loop in bnModInverse function with crafted inputs
Denial of Service via infinite loop in bnModInverse function with crafted inputs. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1287. Affected package(s): quay/quay-rhel8:1779811473, migration-toolkit-virtualization/mtv-console-plugin-rhel9:1779139872, quay/quay-rhel8:1779822261, quay/quay-rhel8:1775253092, quay/quay-rhel9:1779204086, migration-toolkit-virtualization/mtv-console-plugin-rhel9:1778927462. Resolved in Red Hat advisory RHSA-2026:23361 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Quay 3.10; Red Hat Quay 3.12; Red Hat Quay 3.15; Red Hat Quay 3.16; and 1 more.
High [CVE-2026-4602] Signature verification bypass via negative exponent handling
Signature verification bypass via negative exponent handling. Red Hat rates this important (CVSS 7.5). Weakness: CWE-681. Affected package(s): migration-toolkit-virtualization/mtv-console-plugin-rhel9:1779139872, quay/quay-rhel8:1775169155, quay/quay-rhel8:1775253092, quay/quay-rhel9:1779204086, migration-toolkit-virtualization/mtv-console-plugin-rhel9:1778927462, quay/quay-rhel8:1775169219. Resolved in Red Hat advisory RHSA-2026:6926 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Quay 3.10; Red Hat Quay 3.12; Red Hat Quay 3.15; Red Hat Quay 3.16; and 1 more.
High [CVE-2026-4600] Cryptographic signature forgery via malicious DSA domain parameters
Cryptographic signature forgery via malicious DSA domain parameters. Red Hat rates this important (CVSS 8.2). Weakness: CWE-347. Affected package(s): migration-toolkit-virtualization/mtv-console-plugin-rhel9:1779139872, quay/quay-rhel8:1775169155, quay/quay-rhel8:1775253092, quay/quay-rhel9:1779204086, migration-toolkit-virtualization/mtv-console-plugin-rhel9:1778927462, quay/quay-rhel8:1775169219. Resolved in Red Hat advisory RHSA-2026:6926 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Quay 3.10; Red Hat Quay 3.12; Red Hat Quay 3.15; Red Hat Quay 3.16; and 1 more.
High [CVE-2026-4680] Use after free in FedCM
Use after free in FedCM. Red Hat rates this important (CVSS 8.8). 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.
Medium [CVE-2026-33176] Denial of Service via large scientific notation strings
Denial of Service via large scientific notation strings. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-770. Affected package(s): rubygem-activesupport. Resolved in Red Hat advisory RHSA-2026:14835 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
Medium [CVE-2024-47778 +1] Gstreamer: incomplete fix of CVE-2026-1940
An incomplete fix for CVE-2024-47778 allows an out-of-bounds read in gst_wavparse_adtl_chunk() function. The patch added a size validation check lsize + 8 > size, but it does not account for the GST_ROUND_UP_2(lsize) used in the actual offset calculation. When lsize is an odd number, the parser advances more bytes than validated, causing OOB read. Red Hat severity: Moderate — CVSS 5.1 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L). 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. Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: gstreamer1; Red Hat package: mingw-gstreamer1.
Medium [CVE-2026-26209] Denial of Service due to uncontrolled recursion via crafted CBOR payloads
Denial of Service due to uncontrolled recursion via crafted CBOR payloads. Red Hat rates this moderate (CVSS 5.5). Weakness: CWE-770. Affected package(s): rhaiis/vllm-rocm-rhel9:1779223651, rhaiis/vllm-rocm-rhel9:1778244531, rhaiis/vllm-cuda-rhel9:1779223654, rhaiis/vllm-cuda-rhel9:1778274666, rhaiis/vllm-spyre-rhel9:1778244546. Resolved in Red Hat advisory RHSA-2026:19724 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-4628] Keycloak: org.keycloak.authorization: keycloak: unauthorized resource modification due to improper access control
A flaw was found in Keycloak. An improper Access Control vulnerability in Keycloak’s User-Managed Access (UMA) resource_set endpoint allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false restriction. This occurs due to incomplete enforcement of access control checks on PUT operations to the resource_set endpoint. This issue enables unauthorized modification of protected resources, impacting data integrity. MODERATE: This flaw in Keycloak allows authenticated attackers to bypass the `allowRemoteResourceManagement=false` restriction, enabling unauthorized modification of protected resources. This impacts data integrity in Red Hat Build of Keycloak (RHBK) version rhbk-26.4. Other Red Hat products, including Enterprise Application Platform and Red Hat Single Sign-On, are not affected as the vulnerable code is not present. Red Hat severity: Moderate — CVSS 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N). Weakness: CWE-284. Affected Red Hat products: Red Hat Build of Keycloak. Red Hat lists Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack; Red Hat Single Sign-On 7 as not affected. Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-4647] Out-of-Bounds Read in XCOFF Relocation Processing in GNU Binutils BFD Library
Out-of-Bounds Read in XCOFF Relocation Processing in GNU Binutils BFD Library. Red Hat rates this moderate (CVSS 6.1). Weakness: CWE-125. Affected package(s): binutils-main. Resolved in Red Hat advisory RHSA-2026:33527 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; and 3 more.
Medium [CVE-2026-4674] Out of bounds read in CSS
Out of bounds read in CSS. 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-2026-4675] Heap buffer overflow in WebGL
Heap buffer overflow in WebGL. Red Hat rates this important (CVSS 6.5). Weakness: CWE-787. 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-2026-4677] Out of bounds read in WebAudio
Out of bounds read in WebAudio. 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.
Low [CVE-2026-4633] Keycloak: keycloak: user enumeration via differential error messages
A flaw was found in Keycloak. A remote attacker can exploit differential error messages during the identity-first login flow when Organizations are enabled. This vulnerability allows an attacker to determine the existence of users, leading to information disclosure through user enumeration. This flaw has a LOW impact. Red Hat severity: Low — CVSS 3.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N). Weakness: CWE-209. Affected Red Hat products: Red Hat Build of Keycloak. Red Hat does not currently list a fixing RHSA for this CVE.
Critical [CVE-2026-33228] Prototype pollution vulnerability allows arbitrary code execution via crafted JSON.
Prototype pollution vulnerability allows arbitrary code execution via crafted JSON.. Red Hat rates this critical (CVSS 9.8). Weakness: CWE-915. Affected package(s): rhdh/rhdh-hub-rhel9:1777903262, cluster-observability-operator/logging-console-plugin-pf4-rhel9:1782839279, cluster-observability-operator/troubleshooting-panel-console-plugin-pf6-rhel9:1782839996, cluster-observability-operator/logging-console-plugin-pf5-rhel9:1782840539, rhdh/rhdh-hub-rhel9:1776784286. Resolved in Red Hat advisory RHSA-2026:13826 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Developer Hub 1.8; Red Hat Developer Hub 1.9; Red Hat 3scale API Management Platform 2; Red Hat Build of Keycloak; and 2 more.
Critical [CVE-2026-33210] Denial of Service or Information Disclosure via format string injection
Denial of Service or Information Disclosure via format string injection. Red Hat rates this important (CVSS 9.1). Weakness: CWE-134. Affected package(s): ruby4.0, ruby:4.0. Resolved in Red Hat advisory RHSA-2026:20606 — 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.
Critical [CVE-2026-33186] Authorization bypass due to improper HTTP/2 path validation
Authorization bypass due to improper HTTP/2 path validation. Red Hat rates this important (CVSS 9.1). Weakness: CWE-551. Affected package(s): rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9:1780078429, odf4/odf-csi-addons-sidecar-rhel9:1781550957, rhtas/trillian-logserver-rhel9:1776243434, openshift4/ose-cluster-olm-rhel9-operator:1779787336, rhdh/rhdh-rhel9-operator:1774544220, openshift4/ose-csi-driver-nfs-rhel9:1778242571. Resolved in Red Hat advisory RHSA-2026:27893 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat OpenShift Container Platform 4.16; Red Hat OpenShift Container Platform 4.17; Red Hat OpenShift Container Platform 4.18; Red Hat Satellite 6.16 for RHEL 8; and 134 more.
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