# CVE-2026-31441: dmaengine: idxd: Fix memory leak when a wq is reset

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

In the Linux kernel, the following vulnerability has been resolved:

dmaengine: idxd: Fix memory leak when a wq is reset

idxd_wq_disable_cleanup() which is called from the reset path for a
workqueue, sets the wq type to NONE, which for other parts of the
driver mean that the wq is empty (all its resources were released).

Only set the wq type to NONE after its resources are released.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ da32b28c95a79e399e18c03f8178f41aec9c66e4; < a16098a2f0c11ee5e04e23aa7478ca1fcfb0f658 (affected, git); ≥ da32b28c95a79e399e18c03f8178f41aec9c66e4; < 54d77cc0c40ca2f894859dc7b3c52997574f1a2a (affected, git); ≥ da32b28c95a79e399e18c03f8178f41aec9c66e4; < 39c1504e0e76bcfb93991fd94288a83e05d13b51 (affected, git); ≥ da32b28c95a79e399e18c03f8178f41aec9c66e4; < a9e7815d38629bcf59d3005001f1f315424a58de (affected, git); ≥ da32b28c95a79e399e18c03f8178f41aec9c66e4; < 0c3d3ac57e3c52b570b8c695903306bff07e04c8 (affected, git); ≥ da32b28c95a79e399e18c03f8178f41aec9c66e4; < d9cfb5193a047a92a4d3c0e91ea4cc87c8f7c478 (affected, git); 2a2df2bd10de44c3804661ed15157817c12d6291 (affected, git); ≥ 5.7.10; < 5.8 (affected, semver). Source: CNA: Linux
- Linux / Linux: 5.8 (affected); ≥ 0; < 5.8 (unaffected, semver); ≥ 6.1.168; ≤ 6.1.* (unaffected, semver); ≥ 6.6.131; ≤ 6.6.* (unaffected, semver); ≥ 6.12.80; ≤ 6.12.* (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
- Siemens / SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: ≥ V3.1.6; < * (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: ≥ V3.1.5; < * (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: ≥ V3.1.7; < * (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: ≥ V3.1.6; < * (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: ≥ V3.1.5; < * (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: ≥ V3.1.7; < * (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: ≥ V3.1.6; < * (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: ≥ V3.1.5; < * (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: ≥ V3.1.7; < * (affected, custom). Source: ADP: siemens-SADP

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.13% as of 2026-11-05; percentile 2.24%

- 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/a16098a2f0c11ee5e04e23aa7478ca1fcfb0f658 (CNA: Linux)

- https://git.kernel.org/stable/c/54d77cc0c40ca2f894859dc7b3c52997574f1a2a (CNA: Linux)

- https://git.kernel.org/stable/c/39c1504e0e76bcfb93991fd94288a83e05d13b51 (CNA: Linux)

- https://git.kernel.org/stable/c/a9e7815d38629bcf59d3005001f1f315424a58de (CNA: Linux)

- https://git.kernel.org/stable/c/0c3d3ac57e3c52b570b8c695903306bff07e04c8 (CNA: Linux)

- https://git.kernel.org/stable/c/d9cfb5193a047a92a4d3c0e91ea4cc87c8f7c478 (CNA: Linux)

- https://cert-portal.siemens.com/productcert/html/ssa-082556.html (ADP: siemens-SADP)

- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (ADP: siemens-SADP)

- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (ADP: siemens-SADP)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-31441; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-31441; retrieved 2026-11-05; source updated Not reported

Revision: 04f5fa15cf737392acd3f5221927e7f7e9dcd9df5df8c89e96c26fee554f0327

Canonical: https://y2.dev/cve/CVE-2026-31441

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