CVE-2026-6654
Medium
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.
SeverityMedium
CVSS5.1
Exploit probability—
Product
Mozilla Thin-vec
PublishedApr 20, 2026
First seenApr 20, 2026
Weakness typeCWE-415CWE-415CWE-416Use after freeCWE-1341CWE-1341
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla thin-vec | 0.2.15 | — |
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