Bug 2356665 (CVE-2025-21964)

Summary:	CVE-2025-21964 kernel: cifs: Fix integer overflow while processing acregmax mount option
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
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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 2025-04-01 16:05:05 UTC

In the Linux kernel, the following vulnerability has been resolved:

cifs: Fix integer overflow while processing acregmax mount option

User-provided mount parameter acregmax of type u32 is intended to have
an upper limit, but before it is validated, the value is converted from
seconds to jiffies which can lead to an integer overflow.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Comment 1 Robb Gatica 2025-04-01 23:33:48 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040145-CVE-2025-21964-e2c1@gregkh/T

Comment 3 errata-xmlrpc 2025-05-26 11:50:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:8142 https://access.redhat.com/errata/RHSA-2025:8142

Comment 5 errata-xmlrpc 2025-06-02 10:06:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:8374 https://access.redhat.com/errata/RHSA-2025:8374