CVE-2026-40393
Publication date 12 April 2026
Last updated 19 June 2026
Ubuntu priority
Description
In Mesa before 25.3.6 and 26 before 26.0.1, out-of-bounds memory access can occur in WebGPU because the amount of to-be-allocated data depends on an untrusted party, and is then used for alloca.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| mesa | 26.04 LTS resolute |
Not affected
|
| 25.10 questing |
Fixed 25.2.8-0ubuntu0.25.10.2
|
|
| 24.04 LTS noble |
Fixed 25.2.8-0ubuntu0.24.04.2
|
|
| 22.04 LTS jammy |
Fixed 23.2.1-1ubuntu3.1~22.04.4
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
8.1 · High
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8427-1
- Mesa vulnerability
- 15 June 2026