CVE-2026-6654

medium

Published 2026-04-14 · Modified 2026-04-27

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CVSS v3

5.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

5.1

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.

Predictions

Exploit likelihood

51%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
debian	forky	fixed	`0.2.17-1`
debian	sid	fixed	`0.2.17-1`
debian	trixie	affected

Package impact

Ecosystem	Package	Vulnerable	Fixed
crates.io	thin-vec
crates.io	thin-vec	`>=0.0.0-0,<0.2.16`	`0.2.16`
crates.io	thin-vec	`<0.2.16`	`0.2.16`

Application impact

Vendor	Product	Versions	Fixed
mozilla	thin-vec	`0.2.15`

References

CWEs

CWE-415 CWE-416

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.