ESB-2026.4685

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4685 kernel security update 7 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2026-31532 CVE-2025-71238 CVE-2026-23191 CVE-2026-31431 CVE-2026-23401 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:13932 Comment: CVSS (Max): 8.1 CVE-2026-23401 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H The following are listed in the CISA Known Exploited Vulnerabilities (KEV) Catalog: CISA KEV CVE(s): CVE-2026-31431 CISA KEV URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog EPSS (Max): 1.2% (79th) CVE-2026-31431 2026-05-05 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:13932 - Security Advisory Issued: 2026-05-06 Updated: 2026-05-06 Synopsis Kernel security update Type/Severity Security Advisory: Important Topic An update for kernel is now available for Red Hat Enterprise Linux 9.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): o kernel: ALSA: aloop: Fix racy access at PCM trigger (CVE-2026-23191) o kernel: Linux kernel (qla2xxx): Double free vulnerability leads to denial of service and potential privilege escalation. (CVE-2025-71238) o kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling (CVE-2026-23401) o kernel: crypto: algif_aead - Revert to operating out-of-place (CVE-2026-31431) o kernel: can: raw: fix ro->uniq use-after-free in raw_rcv() (CVE-2026-31532) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Affected Products o Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.4 x86_64 o Red Hat Enterprise Linux Server - AUS 9.4 x86_64 o Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.4 s390x o Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.4 ppc64le o Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.4 aarch64 o Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.4 ppc64le o Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.4 x86_64 o Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 9.4 x86_64 o Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 9.4 ppc64le o Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 9.4 s390x o Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 9.4 aarch64 o Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.4 aarch64 o Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.4 s390x o Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.4 x86_64 o Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.4 aarch64 o Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.4 ppc64le o Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.4 s390x Fixes o BZ - 2439947 - CVE-2026-23191 kernel: ALSA: aloop: Fix racy access at PCM trigger o BZ - 2444398 - CVE-2025-71238 kernel: Linux kernel (qla2xxx): Double free vulnerability leads to denial of service and potential privilege escalation. o BZ - 2453803 - CVE-2026-23401 kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling o BZ - 2460538 - CVE-2026-31431 kernel: crypto: algif_aead - Revert to operating out-of-place o BZ - 2461107 - CVE-2026-31532 kernel: can: raw: fix ro->uniq use-after-free in raw_rcv() CVEs o CVE-2025-71238 o CVE-2026-23191 o CVE-2026-23401 o CVE-2026-31431 o CVE-2026-31532 References o https://access.redhat.com/security/updates/classification/#important - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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