Bug 2351629 (CVE-2025-21863)

Summary:	CVE-2025-21863 kernel: io_uring: prevent opcode speculation
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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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

Comment 2 errata-xmlrpc 2025-11-11 08:04:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:20095 https://access.redhat.com/errata/RHSA-2025:20095

Comment 3 errata-xmlrpc 2025-11-11 10:27:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:20518 https://access.redhat.com/errata/RHSA-2025:20518