CVE-2025-21963 Information

Description

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.

Reference

https://git.kernel.org/stable/c/2809a79bc64964ce02e0c5f2d6bd39b9d09bdb3c https://git.kernel.org/stable/c/39d086bb3558da9640ef335f97453e01d32578a1 https://git.kernel.org/stable/c/5b29891f91dfb8758baf1e2217bef4b16b2b165b https://git.kernel.org/stable/c/6124cbf73e3dea7591857dd63b8ccece28952afd https://git.kernel.org/stable/c/9e438d0410a4002d24f420f2c28897ba2dc0af64