CVE-2025-21994 | BDVDB-2026-273176 Detail
LinuxLinux
Description#
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.
Impact#
Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact high. Attack vector: network.
Weaknesses#
No weakness recorded in the source data.
References#
- https://git.kernel.org/stable/c/c3a3484d9d31b27a3db0fab91fcf191132d65236
- https://git.kernel.org/stable/c/9c4e202abff45f8eac17989e549fc7a75095f675
- https://git.kernel.org/stable/c/d0f87370622a853b57e851f7d5a5452b72300f19
- https://git.kernel.org/stable/c/a4cb17797a5d241f1e509cb5b46ed95a80c2f5fd
- https://git.kernel.org/stable/c/f6a6721802ac2f12f4c1bbe839a4c229b61866f2
- https://git.kernel.org/stable/c/1b8b67f3c5e5169535e26efedd3e422172e2db64
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.