CVE-2026-6654
Public on 2026-04-20
Modified on 2026-04-22
Description
Double-Free / Use-After-Free (UAF) in the `IntoIter::drop` and `ThinVec::clear` functions in the thin_vec crate. A panic in `ptr::drop_in_place` skips setting the length to zero.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Firefox Extra | firefox | 2026-05-14 | ALAS2FIREFOX-2026-058 | Fixed |
| Amazon Linux 2023 | firefox | 2026-05-14 | ALAS2023-2026-1652 | Fixed |
| Amazon Linux 2 - Core | rust | 2026-05-14 | ALAS2-2026-3296 | Fixed |
| Amazon Linux 2023 | rust | 2026-05-14 | ALAS2023-2026-1676 | Fixed |
| Amazon Linux 2 - Core | thunderbird | 2026-05-14 | ALAS2-2026-3290 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 7.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H |
| NVD | CVSSv3 | 5.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |