Bug 2356642 (CVE-2025-21963) - CVE-2025-21963 kernel: cifs: Fix integer overflow while processing acdirmax mount option
Summary: CVE-2025-21963 kernel: cifs: Fix integer overflow while processing acdirmax m...
Keywords:
Status: NEW
Alias: CVE-2025-21963
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 16:04 UTC by OSIDB Bzimport
Modified: 2025-04-20 17:05 UTC (History)
4 users (show)

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

cifs: Fix integer overflow while processing acdirmax mount option

User-provided mount parameter acdirmax 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 01:15:18 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040145-CVE-2025-21963-6e21@gregkh/T
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