Bug 2422805 (CVE-2025-68317) - CVE-2025-68317 kernel: Linux kernel: Denial of Service via improper handling of io_uring notification contexts
Summary: CVE-2025-68317 kernel: Linux kernel: Denial of Service via improper handling ...
Keywords:
Status: NEW
Alias: CVE-2025-68317
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-16 16:02 UTC by OSIDB Bzimport
Modified: 2025-12-22 16:44 UTC (History)
0 users

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-12-16 16:02:54 UTC 
In the Linux kernel, the following vulnerability has been resolved:

io_uring/zctx: check chained notif contexts

Send zc only links ubuf_info for requests coming from the same context.
There are some ambiguous syz reports, so let's check the assumption on
notification completion.
Comment 1 Alexander B 2025-12-16 19:23:01 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121656-CVE-2025-68317-28c8@gregkh/T
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