CVE-2026-98003

Published: September 29, 2026Last modified: September 29, 2026

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.

Status

References

• https://git.kernel.org/stable/c/00a7dd64888d6dd72110b40e2824a088cf7b7386
• https://git.kernel.org/stable/c/94458b80d3b203c1c9e2c98aa7319b7713e006c0
• https://git.kernel.org/stable/c/b6be275d19cee01f8f1f08a2ff18337103d05d40