# CVE-2026-31443: dmaengine: idxd: Fix crash when the event log is disabled

Status: published. Published: 2026-04-22. Updated: 2026-11-05.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 6078a315aec15e0776fa90347cf4eba7478cdbd7; < aa0ffc6d3990ec35976308a068dc23178037e564 (affected, git); ≥ 6078a315aec15e0776fa90347cf4eba7478cdbd7; < 0e761079d653c25f838380cf7cef2730832110cc (affected, git); ≥ 6078a315aec15e0776fa90347cf4eba7478cdbd7; < 52d2edea0d63c935e82631e4b9e4a94eccf97b5b (affected, git). Source: CNA: Linux
- Linux / Linux: 6.14 (affected); ≥ 0; < 6.14 (unaffected, semver); ≥ 6.18.21; ≤ 6.18.* (unaffected, semver); ≥ 6.19.11; ≤ 6.19.* (unaffected, semver); ≥ 7.0; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.12% as of 2026-11-05; percentile 1.90%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/aa0ffc6d3990ec35976308a068dc23178037e564 (CNA: Linux)

- https://git.kernel.org/stable/c/0e761079d653c25f838380cf7cef2730832110cc (CNA: Linux)

- https://git.kernel.org/stable/c/52d2edea0d63c935e82631e4b9e4a94eccf97b5b (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-31443; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-31443; retrieved 2026-11-05; source updated Not reported

Revision: 52c2e3bd27bd88095d55e2b600fbc644335969c6c9795a72fb6521405a2a452b

Canonical: https://y2.dev/cve/CVE-2026-31443

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