Bug 2460686 (CVE-2026-31443) - CVE-2026-31443 kernel: dmaengine: idxd: Fix crash when the event log is disabled
Summary: CVE-2026-31443 kernel: dmaengine: idxd: Fix crash when the event log is disabled
Keywords:
Status: NEW
Alias: CVE-2026-31443
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: 2026-04-22 15:05 UTC by OSIDB Bzimport
Modified: 2026-04-22 17:14 UTC (History)
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Description OSIDB Bzimport 2026-04-22 15:05:28 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dmaengine: idxd: Fix crash when the event log is disabled

If reporting errors to the event log is not supported by the hardware,
and an error that causes Function Level Reset (FLR) is received, the
driver will try to restore the event log even if it was not allocated.

Also, only try to free the event log if it was properly allocated.
Comment 1 Keith Grant 2026-04-22 17:12:52 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042245-CVE-2026-31443-0b7d@gregkh/T
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