CVE-2025-21994

Summary

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

ksmbd: fix incorrect validation for num_aces field of smb_acl

parse_dcal() validate num_aces to allocate posix_ace_state_array.

if (num_aces > ULONG_MAX / sizeof(struct smb_ace *))

It is an incorrect validation that we can create an array of size ULONG_MAX. smb_acl has ->size field to calculate actual number of aces in request buffer size. Use this to check invalid num_aces.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf < c3a3484d9d31b27a3db0fab91fcf191132d65236affected
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf < 9c4e202abff45f8eac17989e549fc7a75095f675affected
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf < d0f87370622a853b57e851f7d5a5452b72300f19affected
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf < a4cb17797a5d241f1e509cb5b46ed95a80c2f5fdaffected
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf < f6a6721802ac2f12f4c1bbe839a4c229b61866f2affected
LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf < 1b8b67f3c5e5169535e26efedd3e422172e2db64affected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux5.15.180 <= 5.15.*unaffected
LinuxLinux6.1.132 <= 6.1.*unaffected
LinuxLinux6.6.85 <= 6.6.*unaffected
LinuxLinux6.12.21 <= 6.12.*unaffected
LinuxLinux6.13.9 <= 6.13.*unaffected
LinuxLinux6.14 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

References