CVE-2025-21994
High
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.
SeverityHigh
CVSS7.6
Exploit probability—
Product
Linux Kernel
PublishedApr 2, 2025
First seenApr 2, 2025
How to fix
Update
- linux linux_kernel5.15.180, 6.1.132, 6.6.85, 6.12.21, 6.13.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.15 ≤ v < 5.15.180, 5.16 ≤ v < 6.1.132, 6.2 ≤ v < 6.6.85, 6.7 ≤ v < 6.12.21, 6.13 ≤ v < 6.13.9, 6.14 | 5.15.180, 6.1.132, 6.6.85, 6.12.21, 6.13.9 |
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