CVE-2026-68324 iommu/intel: Fix out-of-bounds memset in dmar_latency_disable()
An out-of-bounds memory write in the Intel IOMMU driver allows local attackers to corrupt kernel memory, potentially leading to privilege escalation or system crashes.
- 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-2026-68324?
CVE-2026-68324 is a memory corruption vulnerability in Linux, published on 10 Aug 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/intel: Fix out-of-bounds memset in dmar_latency_disable()
dmar_latency_disable() intends to zero out only the single latency_statistic entry for the given type, but the memset size was computed as sizeof(*lstat) * DMAR_LATENCY_NUM, which clears the entire array starting from &lstat[type].
When type > 0, this writes beyond the end of the allocated array, corrupting adjacent memory.
Fix by using sizeof(*lstat) to clear only the target entry.
Which versions are affected by CVE-2026-68324?
How do I fix CVE-2026-68324?
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-2026-68324 being exploited?
There is no known exploitation of CVE-2026-68324 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68324, DEBIAN-CVE-2026-68324, GHSA-hrwq-83vm-hr68, UBUNTU-CVE-2026-68324.