Security Advisory

CVE-2025-21994

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2025-04-02 14:00:37

Last updated 2026-05-11 21:10:35

Assigner Linux

State PUBLISHED

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.

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