ESB-2026.3374

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3374 kernel-rt security update 8 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2025-38180 CVE-2025-38206 CVE-2026-23001 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:6948 Comment: CVSS (Max): 7.8 CVE-2026-23001 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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:L/PR:L/UI:N/S:U/C:H/I:H/A:H EPSS (Max): 0.0% (7th) CVE-2025-38206 2026-04-07 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:6948 - Security Advisory Issued: 2026-04-08 Updated: 2026-04-08 Synopsis Kernel-rt security update Type/Severity Security Advisory: Low Topic An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Low. 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): o kernel: Linux kernel: Use-After-Free vulnerability in ATM subsystem (CVE-2025-38180) o kernel: Kernel: Double free vulnerability in exFAT filesystem can lead to denial of service (CVE-2025-38206) o kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001) 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 - Update Services for SAP Solutions 9.2 x86_64 o Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.2 x86_64 Fixes o BZ - 2376376 - CVE-2025-38180 kernel: Linux kernel: Use-After-Free vulnerability in ATM subsystem o BZ - 2376377 - CVE-2025-38206 kernel: Kernel: Double free vulnerability in exFAT filesystem can lead to denial of service o BZ - 2432664 - CVE-2026-23001 kernel: macvlan: fix possible UAF in macvlan_forward_source() CVEs o CVE-2025-38180 o CVE-2025-38206 o CVE-2026-23001 References o https://access.redhat.com/security/updates/classification/#low - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================