CVE-2026-6654

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 v3 5.1 MEDIUM

5.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.5 / Impact : 2.5

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:mozilla:thin-vec:0.2.15:*:*:*:*:rust:*:*

History

30 Jun 2026, 03:21

Type	Values Removed	Values Added
CWE		CWE-1341
References		() 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 -

12 May 2026, 15:19

Type	Values Removed	Values Added
First Time		Mozilla thin-vec Mozilla
References	~~() https://github.com/mozilla/thin-vec/security/advisories/GHSA-xphw-cqx3-667j -~~	() https://github.com/mozilla/thin-vec/security/advisories/GHSA-xphw-cqx3-667j - Exploit, Vendor Advisory
CPE		cpe:2.3:a:mozilla:thin-vec:0.2.15:::::rust::

20 Apr 2026, 14:16

Type	Values Removed	Values Added
CWE		CWE-415 CWE-416
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.1

20 Apr 2026, 11:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-20 11:16

Updated : 2026-07-15 01:16

NVD link : CVE-2026-6654

Mitre link : CVE-2026-6654

CVE.ORG link : CVE-2026-6654

JSON object : View

Products Affected

mozilla

thin-vec

CWE

CWE-415

Double Free

CWE-416

Use After Free

CWE-1341

Multiple Releases of Same Resource or Handle

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"https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:7"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "packageName": "firefox", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "firefox", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "rust-toolset:rhel8/rust", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "thunderbird", 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A panic in `ptr::drop_in_place` skips setting the length to zero."}], "lastModified": "2026-07-15T01:16:50.773", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:thin-vec:0.2.15:*:*:*:*:rust:*:*", "vulnerable": true, "matchCriteriaId": "CABF3FE5-A5CB-491C-A9B3-D1D63D157AB0"}], "operator": "OR"}]}], "sourceIdentifier": "security@mozilla.org"}