CVE-2026-98003 iommu/amd: Do not reallocate GA log buffers on resume
A memory leak in the Linux kernel AMD IOMMU driver during system resume can lead to resource exhaustion and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98003?
CVE-2026-98003 is a memory corruption vulnerability in Linux, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Which versions are affected by CVE-2026-98003?
How do I fix CVE-2026-98003?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-98003 being exploited?
There is no known exploitation of CVE-2026-98003 in the wild and no public exploit code.
Sources
Also known as AZL-104304, BELL-CVE-2026-98003, DEBIAN-CVE-2026-98003, GHSA-mvmg-3rw6-rj84, UBUNTU-CVE-2026-98003.