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CVE-2025-21963

cifs: Fix integer overflow while processing acdirmax mount option

CVSS 5.5 MEDIUMEPSS 0.2%CWE-190
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
Linux · Linux

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References
https://git.kernel.org/stable/c/0c26edf477e093cefc41637f5bccc102e1a77399https://git.kernel.org/stable/c/2809a79bc64964ce02e0c5f2d6bd39b9d09bdb3chttps://git.kernel.org/stable/c/39d086bb3558da9640ef335f97453e01d32578a1https://git.kernel.org/stable/c/5b29891f91dfb8758baf1e2217bef4b16b2b165bhttps://git.kernel.org/stable/c/6124cbf73e3dea7591857dd63b8ccece28952afdhttps://git.kernel.org/stable/c/9e438d0410a4002d24f420f2c28897ba2dc0af64https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html