CVE-2025-40047

io_uring/waitid: always prune wait queue entry in io_waitid_wait()

HIGH
7.8
CVSS Score
Published: October 28, 2025 at 11:48 AM UTC
Updated: October 19, 2026 at 09:10 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.7f31ecf671ddc498f20219453395794ff2383e06b
Vendor states this is fixed in 2f8229d53d984c6a05b71ac9e9583d4354e3b91f (fixed)
Vendor states this is fixed in 3e2205db2f0608898d535da1964e1b376aacfdaa (fixed)
Vendor states this is fixed in 696ba6032081e617564a8113a001b8d7943cb928 (fixed)
Vendor states this is fixed in 6.12.53 (unaffected)
Vendor states this is fixed in 6.17.3 (unaffected)
Vendor states this is fixed in 6.18 (unaffected)
Vendor states this is fixed in 6.7 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusDEFERRED

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