VulnerabilityModified

CVE-2026-6654

Double-Free / Use-After-Free (UAF) in the `IntoIter::drop` and `ThinVec::clear` functions in the thin_vec crate.

MEDIUM 5.1EPSS 0.17%

Does this matter?

Lower severity and a low EPSS score (0.17%). Track it; it rarely justifies an emergency change on its own.

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 3.1: 5.1 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS: 0.17% probability · 6th percentile
CISA KEV: Not listed
Weakness: CWE-415, CWE-416, CWE-1341
Affected: mozilla/thin-vec
Source: security@mozilla.org

References

https://github.com/mozilla/thin-vec/security/advisories/GHSA-xphw-cqx3-667jExploit, Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-6654
https://bugzilla.redhat.com/show_bug.cgi?id=2459689
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6654.json

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.