Tracker / CVE-2026-43350
CVE-2026-43350
In the Linux kernel, the following vulnerability has been resolved: smb: client: require a full NFS mode SID before reading mode bits parse_dacl() treats an ACE SID matching sid_unix_NFS_mode as an NFS mode SID and reads sid.sub_auth[2] to recover the mode bits. That assumes the ACE carries three subauthorities, but compare_sids() only compares min(a, b) subauthorities. A malicious server can return an ACE with num_subauth = 2 and sub_auth[] = {88, 3}, which still matches sid_unix_NFS_mode and then drives the sub_auth[2] read four bytes past the end of the ACE. Require num_subauth >= 3 before treating the ACE as an NFS mode SID. This keeps the fix local to the special-SID mode path without changing compare_sids() semantics for the rest of cifsacl.
Prodotti e versioni affette
| linux | linux_kernel · 5.4 → 6.6.136 |
|---|---|
| linux | linux_kernel · 6.13 → 6.18.25 |
| linux | linux_kernel · 6.19 → 7.0.2 |
| linux | linux_kernel · 6.7 → 6.12.84 |