CVE-2025-21994 — ksmbd: fix incorrect validation for num_aces field of smb_acl
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 po…
Published: 2025-04-02 · CVSS: 7.6 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7