# CVE-2026-6654: rust-thin-vec: Double-Free / Use-After-Free (UAF) in the `IntoIter::drop` and `ThinVec::clear` functions in the thin_vec crate

CVE-2026-6654 is fixed in 25 products on 1 platform, first by ALAS2023-2026-1676, released May 11, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-6654
- Priority: Routine
- CVSS: 5.1 (medium)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 20, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cargo amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | cargo-debuginfo amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | clippy amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | clippy-debuginfo amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | firefox amzn 2023 | 140.10.1-1.amzn2023.0.1 | [ALAS2023-2026-1652](https://patchblox.com/security/data/fix/linux/alas2023-2026-1652.md) | May 11, 2026 |
| Linux | firefox-debuginfo amzn 2023 | 140.10.1-1.amzn2023.0.1 | [ALAS2023-2026-1652](https://patchblox.com/security/data/fix/linux/alas2023-2026-1652.md) | May 11, 2026 |
| Linux | firefox-debugsource amzn 2023 | 140.10.1-1.amzn2023.0.1 | [ALAS2023-2026-1652](https://patchblox.com/security/data/fix/linux/alas2023-2026-1652.md) | May 11, 2026 |
| Linux | rust amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-analyzer amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-analyzer-debuginfo amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-debugger-common amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-debuginfo amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-debugsource amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-doc amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-gdb amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-lldb amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-src amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-std-static amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-std-static-wasm32-unknown-unknown amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-std-static-wasm32-wasip1 amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-thin-vec Debian 14 | 0.2.17-1 | [DEBIAN-CVE-2026-6654](https://patchblox.com/security/data/fix/linux/debian-cve-2026-6654.md) | May 15, 2026 |
| Linux | rust-toolset amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rust-toolset-srpm-macros amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rustfmt amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |
| Linux | rustfmt-debuginfo amzn 2023 | 1.95.0-1.amzn2023.0.2 | [ALAS2023-2026-1676](https://patchblox.com/security/data/fix/linux/alas2023-2026-1676.md) | May 11, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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