Bug 2356624 (CVE-2025-21962) - CVE-2025-21962 kernel: cifs: Fix integer overflow while processing closetimeo mount option
Summary: CVE-2025-21962 kernel: cifs: Fix integer overflow while processing closetimeo...
Keywords:
Status: NEW
Alias: CVE-2025-21962
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-04-01 16:03 UTC by OSIDB Bzimport
Modified: 2025-06-16 07:44 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2025:9079 0 None None None 2025-06-16 07:44:11 UTC

Description OSIDB Bzimport 2025-04-01 16:03:14 UTC 
In the Linux kernel, the following vulnerability has been resolved:

cifs: Fix integer overflow while processing closetimeo mount option

User-provided mount parameter closetimeo 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 2025-04-02 02:35:58 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040145-CVE-2025-21962-9f86@gregkh/T
Comment 3 errata-xmlrpc 2025-06-16 07:44:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:9079 https://access.redhat.com/errata/RHSA-2025:9079
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