Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Do not reallocate GA log buffers on resume Commit c5e1a1eb9279 ("iommu/amd: Simplify and Consolidate Virtual APIC (AVIC) Enablement") moved the GA log allocation from iommu_init_pci() to enable_iommus_vapic(), which is called on every resume. iommu_init_ga_log() assigns iommu->ga_log and iommu->ga_log_tail unconditionally. Each resume therefore replaces the boot-time pointers and leaks both old allocations. The function also uses GFP_KERNEL from a syscore resume callback, where interrupts are disabled and the non-boot CPUs are offline. Return early if both buffers are already allocated. Clear the pointers in free_ga_log() so a partial allocation failure cannot leave ga_log dangling.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• CERT-FR16 Oct 2026CERTFR-2026-AVI-1335

  Multiple vulnerabilities in the SUSE Linux kernel Translated from French

  Multiple vulnerabilities have been discovered in the SUSE Linux kernel. Some of them allow an attacker to cause privilege escalation, remote denial of service and a breach of data confidentiality.

  CVE-2026-72436CVE-2026-74632CVE-2026-89702+602 more CVEs
• BSI CERT-Bund24 Sep 2026WID-SEC-2026-3579

  Linux Kernel: Multiple vulnerabilities Translated from German

  CVE-2026-97615CVE-2026-97978CVE-2026-98127+590 more CVEs

[ References ]References

• git.kernel.org/stable/c/00a7dd64888d6dd72110b40e2824a088cf7b7386
• git.kernel.org/stable/c/8b95269d7a43b737c2c0e2fa77bf00cc8a3a4434
• git.kernel.org/stable/c/94458b80d3b203c1c9e2c98aa7319b7713e006c0
• git.kernel.org/stable/c/b6be275d19cee01f8f1f08a2ff18337103d05d40
• git.kernel.org/stable/c/ff85cdc2889e1c885eed218ee5bc0b59e0235b3f