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VulnerabilityPublished Updated

CVE-2026-31523: Linux kernel · nvme-pci: ensure we're polling a polled queue

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ba167d5982e2eb6ff9356d409eca592ce99555da : patch Linux kernel soon.

Data as of 5 Nov 2026, 22:17 UTC

Severity
High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch
Available – fixed in ba167d5982e2eb6ff9356d409eca592ce99555da, b222680ba55e018426c4535067a008f1d81a5d21, b96c7b25eb1b748f3e3b1832ebf028b0b223d7e3 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 4b04cc6a8f86c4842314def22332de1f15de8523, < ba167d5982e2eb6ff9356d409eca592ce99555da
Fixed in
  • ba167d5982e2eb6ff9356d409eca592ce99555da
LinuxLinuxAffected
  • ≥ 4b04cc6a8f86c4842314def22332de1f15de8523, < b222680ba55e018426c4535067a008f1d81a5d21
Fixed in
  • b222680ba55e018426c4535067a008f1d81a5d21
LinuxLinuxAffected
  • ≥ 4b04cc6a8f86c4842314def22332de1f15de8523, < b96c7b25eb1b748f3e3b1832ebf028b0b223d7e3
Fixed in
  • b96c7b25eb1b748f3e3b1832ebf028b0b223d7e3
LinuxLinuxAffected
  • ≥ 4b04cc6a8f86c4842314def22332de1f15de8523, < acbc72dd1a09df53cafcf577259f4678be6afd6d
Fixed in
  • acbc72dd1a09df53cafcf577259f4678be6afd6d
LinuxLinuxAffected
  • ≥ 4b04cc6a8f86c4842314def22332de1f15de8523, < 965e2c943f065122f14282a88d70a8a92e12a4da
Fixed in
  • 965e2c943f065122f14282a88d70a8a92e12a4da
LinuxLinuxAffected
  • ≥ 4b04cc6a8f86c4842314def22332de1f15de8523, < 0685dd9cb855ab77fcf3577b4702ba1d6df1c98d
Fixed in
  • 0685dd9cb855ab77fcf3577b4702ba1d6df1c98d

AI-suggested

This vulnerability has been fixed in the Linux kernel. Users should update to a kernel version that includes the listed fixes. No additional mitigation is required beyond applying the official patches.

Description

A vulnerability in the Linux kernel's nvme-pci driver allows a race condition during queue polling after a reset. This occurs because a high-priority task may poll a queue before the block layer updates queue mappings, potentially causing double completions.

References

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