CVE-2025-22039

Summary

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix overflow in dacloffset bounds check

The dacloffset field was originally typed as int and used in an unchecked addition, which could overflow and bypass the existing bounds check in both smb_check_perm_dacl() and smb_inherit_dacl().

This could result in out-of-bounds memory access and a kernel crash when dereferencing the DACL pointer.

This patch converts dacloffset to unsigned int and uses check_add_overflow() to validate access to the DACL.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf < 6a9cd9ff0fa2bcc30b2bfb8bdb161eb20e44b9dcaffected
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf < 6b8d379048b168a0dff5ab1acb975b933f368514affected
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf < 443b373a4df5a2cb9f7b8c4658b2afedeb16397faffected
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf < beff0bc9d69bc8e733f9bca28e2d3df5b3e10e42affected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux6.12.23 <= 6.12.*unaffected
LinuxLinux6.13.11 <= 6.13.*unaffected
LinuxLinux6.14.2 <= 6.14.*unaffected
LinuxLinux6.15 <= *unaffected

Weaknesses

References