CVE-2026-6654
Use-After-Free and Double-Free in IntoIter::drop when element drop panics
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.
INFO
Published Date :
April 20, 2026, 11:16 a.m.
Last Modified :
May 12, 2026, 3:19 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the thin_vec crate to the latest secure version.
- Review code for proper memory management practices.
- Ensure panic handling does not skip memory deallocation.
- Test thoroughly for memory safety issues.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-6654.
| URL | Resource |
|---|---|
| https://github.com/mozilla/thin-vec/security/advisories/GHSA-xphw-cqx3-667j | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-6654 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-6654
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-6654 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-6654 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 12, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:mozilla:thin-vec:0.2.15:*:*:*:*:rust:*:* Added Reference Type Mozilla Corporation: https://github.com/mozilla/thin-vec/security/advisories/GHSA-xphw-cqx3-667j Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Added CWE CWE-415 Added CWE CWE-416 -
New CVE Received by [email protected]
Apr. 20, 2026
Action Type Old Value New Value Added 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. Added Reference https://github.com/mozilla/thin-vec/security/advisories/GHSA-xphw-cqx3-667j