# CVE-2025-62408: c-ares has a Use After Free vulnerability when connection is cleaned up after error

CVE-2025-62408 is fixed in 33 products on 1 platform, first by libc-ares2 1.34.5-1ubuntu0.1, released December 8, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-62408
- Priority: Routine
- CVSS: 5.9 (Moderate)
- EPSS: 0.0046
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 8, 2025
- Weakness: Use After Free
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62408

## Description

c-ares - security update

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | c-ares Debian 13.5 (trixie) | 1.34.5-1+deb13u1 | [DSA-6084-1](https://patchblox.com/security/data/fix/linux/dsa-6084-1.md) | Dec 18, 2025 |
| Linux | c-ares Debian 14 | 1.34.6-1 | [DEBIAN-CVE-2025-62408](https://patchblox.com/security/data/fix/linux/debian-cve-2025-62408.md) | Dec 8, 2025 |
| Linux | c-ares sles 15.6 | 1.34.8-150000.3.29.1 | [SUSE-SU-2026:4021-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4021-1.md) | Sep 7, 2026 |
| Linux | c-ares sles 15.7 | 1.34.8-150000.3.29.1 | [SUSE-SU-2026:4021-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4021-1.md) | Sep 7, 2026 |
| Linux | libc-ares2 Ubuntu 25.10 (questing) | 1.34.5-1ubuntu0.1 | [libc-ares2 1.34.5-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libc-ares2-1.34.5-1ubuntu0.1.md) | Dec 8, 2025 |
| Linux | libcares2 Ubuntu 25.10 (questing) | 1.34.5-1ubuntu0.1 | [libcares2 1.34.5-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libcares2-1.34.5-1ubuntu0.1.md) | Dec 8, 2025 |
| Linux | nodejs20 amzn 2023 | 1:20.19.5-1.amzn2023.0.2 | [ALAS2023-2025-1346](https://patchblox.com/security/data/fix/linux/alas2023-2025-1346.md) | Jan 7, 2026 |
| Linux | nodejs20-debuginfo amzn 2023 | 1:20.19.5-1.amzn2023.0.2 | [ALAS2023-2025-1346](https://patchblox.com/security/data/fix/linux/alas2023-2025-1346.md) | Jan 7, 2026 |
| Linux | nodejs20-debugsource amzn 2023 | 1:20.19.5-1.amzn2023.0.2 | [ALAS2023-2025-1346](https://patchblox.com/security/data/fix/linux/alas2023-2025-1346.md) | Jan 7, 2026 |
| Linux | nodejs20-devel amzn 2023 | 1:20.19.5-1.amzn2023.0.2 | [ALAS2023-2025-1346](https://patchblox.com/security/data/fix/linux/alas2023-2025-1346.md) | Jan 7, 2026 |
| Linux | nodejs20-docs amzn 2023 | 1:20.19.5-1.amzn2023.0.2 | [ALAS2023-2025-1346](https://patchblox.com/security/data/fix/linux/alas2023-2025-1346.md) | Jan 7, 2026 |
| Linux | nodejs20-full-i18n amzn 2023 | 1:20.19.5-1.amzn2023.0.2 | [ALAS2023-2025-1346](https://patchblox.com/security/data/fix/linux/alas2023-2025-1346.md) | Jan 7, 2026 |
| Linux | nodejs20-libs amzn 2023 | 1:20.19.5-1.amzn2023.0.2 | [ALAS2023-2025-1346](https://patchblox.com/security/data/fix/linux/alas2023-2025-1346.md) | Jan 7, 2026 |
| Linux | nodejs20-libs-debuginfo amzn 2023 | 1:20.19.5-1.amzn2023.0.2 | [ALAS2023-2025-1346](https://patchblox.com/security/data/fix/linux/alas2023-2025-1346.md) | Jan 7, 2026 |
| Linux | nodejs20-npm amzn 2023 | 1:10.8.2-1.20.19.5.1.amzn2023.0.2 | [ALAS2023-2025-1346](https://patchblox.com/security/data/fix/linux/alas2023-2025-1346.md) | Jan 7, 2026 |
| Linux | nodejs22 amzn 2023 | 1:22.21.1-1.amzn2023.0.2 | [ALAS2023-2025-1347](https://patchblox.com/security/data/fix/linux/alas2023-2025-1347.md) | Jan 7, 2026 |
| Linux | nodejs22-debuginfo amzn 2023 | 1:22.21.1-1.amzn2023.0.2 | [ALAS2023-2025-1347](https://patchblox.com/security/data/fix/linux/alas2023-2025-1347.md) | Jan 7, 2026 |
| Linux | nodejs22-debugsource amzn 2023 | 1:22.21.1-1.amzn2023.0.2 | [ALAS2023-2025-1347](https://patchblox.com/security/data/fix/linux/alas2023-2025-1347.md) | Jan 7, 2026 |
| Linux | nodejs22-devel amzn 2023 | 1:22.21.1-1.amzn2023.0.2 | [ALAS2023-2025-1347](https://patchblox.com/security/data/fix/linux/alas2023-2025-1347.md) | Jan 7, 2026 |
| Linux | nodejs22-docs amzn 2023 | 1:22.21.1-1.amzn2023.0.2 | [ALAS2023-2025-1347](https://patchblox.com/security/data/fix/linux/alas2023-2025-1347.md) | Jan 7, 2026 |
| Linux | nodejs22-full-i18n amzn 2023 | 1:22.21.1-1.amzn2023.0.2 | [ALAS2023-2025-1347](https://patchblox.com/security/data/fix/linux/alas2023-2025-1347.md) | Jan 7, 2026 |
| Linux | nodejs22-libs amzn 2023 | 1:22.21.1-1.amzn2023.0.2 | [ALAS2023-2025-1347](https://patchblox.com/security/data/fix/linux/alas2023-2025-1347.md) | Jan 7, 2026 |
| Linux | nodejs22-libs-debuginfo amzn 2023 | 1:22.21.1-1.amzn2023.0.2 | [ALAS2023-2025-1347](https://patchblox.com/security/data/fix/linux/alas2023-2025-1347.md) | Jan 7, 2026 |
| Linux | nodejs22-npm amzn 2023 | 1:10.9.4-1.22.21.1.1.amzn2023.0.2 | [ALAS2023-2025-1347](https://patchblox.com/security/data/fix/linux/alas2023-2025-1347.md) | Jan 7, 2026 |
| Linux | nodejs24 amzn 2023 | 1:24.11.1-1.amzn2023.0.2 | [ALAS2023-2025-1348](https://patchblox.com/security/data/fix/linux/alas2023-2025-1348.md) | Jan 7, 2026 |
| Linux | nodejs24-debuginfo amzn 2023 | 1:24.11.1-1.amzn2023.0.2 | [ALAS2023-2025-1348](https://patchblox.com/security/data/fix/linux/alas2023-2025-1348.md) | Jan 7, 2026 |
| Linux | nodejs24-debugsource amzn 2023 | 1:24.11.1-1.amzn2023.0.2 | [ALAS2023-2025-1348](https://patchblox.com/security/data/fix/linux/alas2023-2025-1348.md) | Jan 7, 2026 |
| Linux | nodejs24-devel amzn 2023 | 1:24.11.1-1.amzn2023.0.2 | [ALAS2023-2025-1348](https://patchblox.com/security/data/fix/linux/alas2023-2025-1348.md) | Jan 7, 2026 |
| Linux | nodejs24-docs amzn 2023 | 1:24.11.1-1.amzn2023.0.2 | [ALAS2023-2025-1348](https://patchblox.com/security/data/fix/linux/alas2023-2025-1348.md) | Jan 7, 2026 |
| Linux | nodejs24-full-i18n amzn 2023 | 1:24.11.1-1.amzn2023.0.2 | [ALAS2023-2025-1348](https://patchblox.com/security/data/fix/linux/alas2023-2025-1348.md) | Jan 7, 2026 |
| Linux | nodejs24-libs amzn 2023 | 1:24.11.1-1.amzn2023.0.2 | [ALAS2023-2025-1348](https://patchblox.com/security/data/fix/linux/alas2023-2025-1348.md) | Jan 7, 2026 |
| Linux | nodejs24-libs-debuginfo amzn 2023 | 1:24.11.1-1.amzn2023.0.2 | [ALAS2023-2025-1348](https://patchblox.com/security/data/fix/linux/alas2023-2025-1348.md) | Jan 7, 2026 |
| Linux | nodejs24-npm amzn 2023 | 1:11.6.2-1.24.11.1.1.amzn2023.0.2 | [ALAS2023-2025-1348](https://patchblox.com/security/data/fix/linux/alas2023-2025-1348.md) | Jan 7, 2026 |
| Linux | v8-11.3-devel amzn 2023 | 3:11.3.244.8-1.20.19.5.1.amzn2023.0.2 | [ALAS2023-2025-1346](https://patchblox.com/security/data/fix/linux/alas2023-2025-1346.md) | Jan 7, 2026 |
| Linux | v8-12.4-devel amzn 2023 | 3:12.4.254.21-1.22.21.1.1.amzn2023.0.2 | [ALAS2023-2025-1347](https://patchblox.com/security/data/fix/linux/alas2023-2025-1347.md) | Jan 7, 2026 |
| Linux | v8-13.6-devel amzn 2023 | 3:13.6.233.10-1.24.11.1.1.amzn2023.0.2 | [ALAS2023-2025-1348](https://patchblox.com/security/data/fix/linux/alas2023-2025-1348.md) | Jan 7, 2026 |

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Data as of 2026-11-09T19:38:12Z 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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