# CVE-2026-31523: nvme-pci: ensure we're polling a polled queue

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

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

nvme-pci: ensure we're polling a polled queue

A user can change the polled queue count at run time. There's a brief
window during a reset where a hipri task may try to poll that queue
before the block layer has updated the queue maps, which would race with
the now interrupt driven queue and may cause double completions.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 4b04cc6a8f86c4842314def22332de1f15de8523; < 965e2c943f065122f14282a88d70a8a92e12a4da (affected, git); ≥ 4b04cc6a8f86c4842314def22332de1f15de8523; < ba167d5982e2eb6ff9356d409eca592ce99555da (affected, git); ≥ 4b04cc6a8f86c4842314def22332de1f15de8523; < 0685dd9cb855ab77fcf3577b4702ba1d6df1c98d (affected, git); ≥ 4b04cc6a8f86c4842314def22332de1f15de8523; < 6f12734c4b619f923a4df0b1a46b8098b187d324 (affected, git); ≥ 4b04cc6a8f86c4842314def22332de1f15de8523; < acbc72dd1a09df53cafcf577259f4678be6afd6d (affected, git); ≥ 4b04cc6a8f86c4842314def22332de1f15de8523; < b96c7b25eb1b748f3e3b1832ebf028b0b223d7e3 (affected, git); ≥ 4b04cc6a8f86c4842314def22332de1f15de8523; < b222680ba55e018426c4535067a008f1d81a5d21 (affected, git); ≥ 4b04cc6a8f86c4842314def22332de1f15de8523; < 166e31d7dbf6aa44829b98aa446bda5c9580f12a (affected, git). Source: CNA: Linux
- Linux / Linux: 5.0 (affected); ≥ 0; < 5.0 (unaffected, semver); ≥ 5.10.253; ≤ 5.10.* (unaffected, semver); ≥ 5.15.203; ≤ 5.15.* (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

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.09% as of 2026-11-05; percentile 0.41%

- 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/965e2c943f065122f14282a88d70a8a92e12a4da (CNA: Linux)

- https://git.kernel.org/stable/c/ba167d5982e2eb6ff9356d409eca592ce99555da (CNA: Linux)

- https://git.kernel.org/stable/c/0685dd9cb855ab77fcf3577b4702ba1d6df1c98d (CNA: Linux)

- https://git.kernel.org/stable/c/6f12734c4b619f923a4df0b1a46b8098b187d324 (CNA: Linux)

- https://git.kernel.org/stable/c/acbc72dd1a09df53cafcf577259f4678be6afd6d (CNA: Linux)

- https://git.kernel.org/stable/c/b96c7b25eb1b748f3e3b1832ebf028b0b223d7e3 (CNA: Linux)

- https://git.kernel.org/stable/c/b222680ba55e018426c4535067a008f1d81a5d21 (CNA: Linux)

- https://git.kernel.org/stable/c/166e31d7dbf6aa44829b98aa446bda5c9580f12a (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-31523; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-31523; retrieved 2026-11-05; source updated Not reported

Revision: 4e0981b8cc61fb9aea4657e8fe69a93aab117b0153a2ca7dc5ebf3f9cd1be558

Canonical: https://y2.dev/cve/CVE-2026-31523

## Agent and API access

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- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

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- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

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- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.