High 7.8Published Oct 28, 2025

CVE-2025-40047io_uring/waitid: always prune wait queue entry in io_waitid_wait()

Updated under an hour ago (Oct 27, 2026, 3:10 PM ET)

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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: io_uring/waitid: always prune wait queue entry in io_waitid_wait() For a successful return, always remove our entry from the wait queue entry list. Previously this was skipped if a cancelation was in progress, but this can race with another invocation of the wait queue entry callback.

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: Deferred
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f31ecf671ddc498f20219453395794ff2383e06b before 696ba6032081e617564a8113a001b8d7943cb928; from f31ecf671ddc498f20219453395794ff2383e06b before 3e2205db2f0608898d535da1964e1b376aacfdaa; from f31ecf671ddc498f20219453395794ff2383e06b before 2f8229d53d984c6a05b71ac9e9583d4354e3b91f	CNA record

References

References

https://git.kernel.org/stable/c/696ba6032081e617564a8113a001b8d7943cb928
https://git.kernel.org/stable/c/3e2205db2f0608898d535da1964e1b376aacfdaa
https://git.kernel.org/stable/c/2f8229d53d984c6a05b71ac9e9583d4354e3b91f

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.