Bug 2351629 (CVE-2025-21863) - CVE-2025-21863 kernel: io_uring: prevent opcode speculation
Summary: CVE-2025-21863 kernel: io_uring: prevent opcode speculation
Keywords:
Status: NEW
Alias: CVE-2025-21863
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: 2025-03-12 12:24 UTC by OSIDB Bzimport
Modified: 2025-03-12 16:13 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-03-12 12:24:23 UTC 
In the Linux kernel, the following vulnerability has been resolved:

io_uring: prevent opcode speculation

sqe->opcode is used for different tables, make sure we santitise it
against speculations.
Comment 1 Mauro Matteo Cascella 2025-03-12 16:03:14 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025031217-CVE-2025-21863-a73a@gregkh/T
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