Bug 2460680 (CVE-2026-31442) - CVE-2026-31442 kernel: dmaengine: idxd: Fix possible invalid memory access after FLR
Summary: CVE-2026-31442 kernel: dmaengine: idxd: Fix possible invalid memory access af...
Keywords:
Status: NEW
Alias: CVE-2026-31442
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-22 15:05 UTC by OSIDB Bzimport
Modified: 2026-04-22 17:11 UTC (History)
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Description OSIDB Bzimport 2026-04-22 15:05:06 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dmaengine: idxd: Fix possible invalid memory access after FLR

In the case that the first Function Level Reset (FLR) concludes
correctly, but in the second FLR the scratch area for the saved
configuration cannot be allocated, it's possible for a invalid memory
access to happen.

Always set the deallocated scratch area to NULL after FLR completes.
Comment 1 Keith Grant 2026-04-22 17:10:23 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042244-CVE-2026-31442-dece@gregkh/T
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