TI-2026-05840 Aliases CVE-2026-6654 GHSA-xphw-cqx3-667j

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

LOW 22CWE-415Published 2026-04-20 · Updated 2026-07-15

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00168 6th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed thin-vec (Mozilla): 0.2.16thin-vec (crates.io): 0.2.16

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Mozilla	thin-vec	—	0.2.16	Patch available	CNA
—	thin-vec (crates.io)	before 0.2.16	0.2.16	Patch available	GHSA-xphw-cqx3-667j

thin-vec VendorMozilla Affected — Fixed in 0.2.16 Patch available CNA
thin-vec (crates.io) Vendor— Affected before 0.2.16 Fixed in 0.2.16 Patch available GHSA-xphw-cqx3-667j

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:thin-vec:0.2.15:::::rust::	0.2.15	Vulnerable	Mozilla

cpe:2.3:a:mozilla:thin-vec:0.2.15:*:*:*:*:rust:*:* Versions 0.2.15 Vulnerable ·Mozilla

Remediation

Fix · CNA thin-vec (Mozilla) Fixed in 0.2.16
Fix · GHSA-xphw-cqx3-667j thin-vec (crates.io) Fixed in 0.2.16 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 5 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Enterprise Linux AI (RHEL AI) 3

Timeline

2026-10-02 Threatist record created from CVE-2026-6654
2026-10-03 Alias added: GHSA-xphw-cqx3-667j

References

Exploit 1

https://github.com/mozilla/thin-vec/security/advisories/GHSA-xphw-cqx3-667j

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-6654

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences