Bug 2513355 (CVE-2026-68324) - CVE-2026-68324 kernel: iommu/intel: Fix out-of-bounds memset in dmar_latency_disable()
Summary: CVE-2026-68324 kernel: iommu/intel: Fix out-of-bounds memset in dmar_latency_...
Keywords:
Status: NEW
Alias: CVE-2026-68324
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-10 12:32 UTC by OSIDB Bzimport
Modified: 2026-08-12 20:19 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-08-10 12:32:47 UTC
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.


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