Use-After-Free and Double-Free in IntoIter::drop when element drop panics

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Summary

CVECVE-2026-6654
StatePUBLISHED
Assignermozilla
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-20 11:16:19 UTC
Updated2026-04-20 11:16:19 UTC
DescriptionDouble-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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mozilla Thin-vec unaffected 0.2.16 * rpm Not specified

References

ReferenceSourceLinkTags
github.com/mozilla/thin-vec/security/advisories/GHSA-xphw-cqx3-667j [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Juhyung Son (en)

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