Bug 2406758 (CVE-2025-40047) - CVE-2025-40047 kernel: io_uring/waitid: always prune wait queue entry in io_waitid_wait()
Summary: CVE-2025-40047 kernel: io_uring/waitid: always prune wait queue entry in io_w...
Keywords:
Status: NEW
Alias: CVE-2025-40047
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-10-28 12:03 UTC by OSIDB Bzimport
Modified: 2026-02-02 15:25 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2025:21469 0 None None None 2025-11-17 09:26:49 UTC
Red Hat Product Errata RHSA-2025:21933 0 None None None 2025-11-24 10:21:14 UTC
Red Hat Product Errata RHSA-2025:22854 0 None None None 2025-12-08 14:42:27 UTC
Red Hat Product Errata RHSA-2026:1727 0 None None None 2026-02-02 15:25:17 UTC

Description OSIDB Bzimport 2025-10-28 12:03:55 UTC 
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.
Comment 1 Jon Moroney 2025-10-28 18:27:49 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025102813-CVE-2025-40047-b952@gregkh/T
Comment 4 errata-xmlrpc 2025-11-17 09:26:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:21469 https://access.redhat.com/errata/RHSA-2025:21469
Comment 5 errata-xmlrpc 2025-11-24 10:21:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2025:21933 https://access.redhat.com/errata/RHSA-2025:21933
Comment 6 errata-xmlrpc 2025-12-08 14:42:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:22854 https://access.redhat.com/errata/RHSA-2025:22854
Comment 10 errata-xmlrpc 2026-02-02 15:25:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:1727 https://access.redhat.com/errata/RHSA-2026:1727
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