CVE-2025-21946 Information

Description

In the Linux kernel the following vulnerability has been resolved:

ksmbd: fix out-of-bounds in parse_sec_desc()

If osidoffset gsidoffset and dacloffset could be greater than smb_ntsd struct size. If it is smaller It could cause slab-out-of-bounds. And when validating sid It need to check it included subauth array size.

Reference

https://git.kernel.org/stable/c/159d059cbcb0e6d0e7a7b34af3862ba09a6b22d1 https://git.kernel.org/stable/c/6a9831180d0b23b5c97e2bd841aefc8f82900172 https://git.kernel.org/stable/c/c1569dbbe2d43041be9f3fef7ca08bec3b66ad1b https://git.kernel.org/stable/c/d6e13e19063db24f94b690159d0633aaf72a0f03