High 7.8Published May 20, 2025

CVE-2025-37906ublk: fix race between io_uring_cmd_complete_in_task and ublk_cancel_cmd

Updated under an hour ago (2026-10-22 01:23 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ublk: fix race between io_uring_cmd_complete_in_task and ublk_cancel_cmd ublk_cancel_cmd() calls io_uring_cmd_done() to complete uring_cmd, but we may have scheduled task work via io_uring_cmd_complete_in_task() for dispatching request, then kernel crash can be triggered. Fix it by not trying to canceling the command if ublk block request is started.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 21, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 216c8f5ef0f209a3797292c487bdaa6991ab4b92 before 346b7d74c612234dae0878892682b9722e7c04c8; from 216c8f5ef0f209a3797292c487bdaa6991ab4b92 before fb2eb9ddf556f93fef45201e1f9d2b8674bcc975; from 216c8f5ef0f209a3797292c487bdaa6991ab4b92 before f40139fde5278d81af3227444fd6e76a76b9506d	CNA record
linux linux_kernel linux:linux_kernel	from 6.7 before 6.14.6; 6.15; 6.15; 6.15	NVD

References

https://git.kernel.org/stable/c/346b7d74c612234dae0878892682b9722e7c04c8
https://git.kernel.org/stable/c/fb2eb9ddf556f93fef45201e1f9d2b8674bcc975patch
https://git.kernel.org/stable/c/f40139fde5278d81af3227444fd6e76a76b9506dpatch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.