CVE-2025-40204
Published: November 14, 2025Last modified: June 24, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: sctp: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.1 |
| Attack Vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.158-r0) |
| 25 LTS | linux-lts | Fixed (6.12.57-r0) | |
| Stream | linux-lts | Fixed (6.18.35-r1) |
References
- https://git.kernel.org/stable/c/0b32ff285ff6f6f1ac1d9495787ccce8837d6405
- https://git.kernel.org/stable/c/0e8b8c326c2a6de4d837b1bb034ea704f4690d77
- https://git.kernel.org/stable/c/1cd60e0d0fb8f0e62ec4499138afce6342dc9d4c
- https://git.kernel.org/stable/c/8019b3699289fce3f10b63f98601db97b8d105b0
- https://git.kernel.org/stable/c/9c05d44ec24126fc283835b68f82dba3ae985209
- https://git.kernel.org/stable/c/b93fa8dc521d00d2d44bf034fb90e0d79b036617
- https://git.kernel.org/stable/c/dd91c79e4f58fbe2898dac84858033700e0e99fb
- https://git.kernel.org/stable/c/ed3044b9c810c5c24eb2830053fbfe5fd134c5d4