# CVE-2025-47279: undici Denial of Service attack via bad certificate data

CVE-2025-47279 is fixed in 21 products on 1 platform, first by DEBIAN-CVE-2025-47279, released May 15, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-47279
- Priority: Routine
- CVSS: 3.1 (Low)
- EPSS: 0.0034
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 15, 2025
- Weakness: Missing Release of Memory after Effective Lifetime
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47279

## Description

Undici is an HTTP/1.1 client for Node.js. Prior to versions 5.29.0, 6.21.2, and 7.5.0, applications that use undici to implement a webhook-like system are vulnerable. If the attacker set up a server with an invalid certificate, and they can force the application to call the webhook repeatedly, then they can cause a memory leak. This has been patched in versions 5.29.0, 6.21.2, and 7.5.0. As a workaound, avoid calling a webhook repeatedly if the webhook fails.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-undici Debian 14 | 7.24.5+dfsg+~cs3.2.0-1 | [DEBIAN-CVE-2025-47279](https://patchblox.com/security/data/fix/linux/debian-cve-2025-47279.md) | May 15, 2025 |
| Linux | nodejs20 amzn 2023 | 1:20.19.2-1.amzn2023.0.1 | [ALAS2023-2025-1010](https://patchblox.com/security/data/fix/linux/alas2023-2025-1010.md) | Jun 4, 2025 |
| Linux | nodejs20-debuginfo amzn 2023 | 1:20.19.2-1.amzn2023.0.1 | [ALAS2023-2025-1010](https://patchblox.com/security/data/fix/linux/alas2023-2025-1010.md) | Jun 4, 2025 |
| Linux | nodejs20-debugsource amzn 2023 | 1:20.19.2-1.amzn2023.0.1 | [ALAS2023-2025-1010](https://patchblox.com/security/data/fix/linux/alas2023-2025-1010.md) | Jun 4, 2025 |
| Linux | nodejs20-devel amzn 2023 | 1:20.19.2-1.amzn2023.0.1 | [ALAS2023-2025-1010](https://patchblox.com/security/data/fix/linux/alas2023-2025-1010.md) | Jun 4, 2025 |
| Linux | nodejs20-docs amzn 2023 | 1:20.19.2-1.amzn2023.0.1 | [ALAS2023-2025-1010](https://patchblox.com/security/data/fix/linux/alas2023-2025-1010.md) | Jun 4, 2025 |
| Linux | nodejs20-full-i18n amzn 2023 | 1:20.19.2-1.amzn2023.0.1 | [ALAS2023-2025-1010](https://patchblox.com/security/data/fix/linux/alas2023-2025-1010.md) | Jun 4, 2025 |
| Linux | nodejs20-libs amzn 2023 | 1:20.19.2-1.amzn2023.0.1 | [ALAS2023-2025-1010](https://patchblox.com/security/data/fix/linux/alas2023-2025-1010.md) | Jun 4, 2025 |
| Linux | nodejs20-libs-debuginfo amzn 2023 | 1:20.19.2-1.amzn2023.0.1 | [ALAS2023-2025-1010](https://patchblox.com/security/data/fix/linux/alas2023-2025-1010.md) | Jun 4, 2025 |
| Linux | nodejs20-npm amzn 2023 | 1:10.8.2-1.20.19.2.1.amzn2023.0.1 | [ALAS2023-2025-1010](https://patchblox.com/security/data/fix/linux/alas2023-2025-1010.md) | Jun 4, 2025 |
| Linux | nodejs22 amzn 2023 | 1:22.16.0-1.amzn2023.0.1 | [ALAS2023-2025-1009](https://patchblox.com/security/data/fix/linux/alas2023-2025-1009.md) | Jun 4, 2025 |
| Linux | nodejs22-debuginfo amzn 2023 | 1:22.16.0-1.amzn2023.0.1 | [ALAS2023-2025-1009](https://patchblox.com/security/data/fix/linux/alas2023-2025-1009.md) | Jun 4, 2025 |
| Linux | nodejs22-debugsource amzn 2023 | 1:22.16.0-1.amzn2023.0.1 | [ALAS2023-2025-1009](https://patchblox.com/security/data/fix/linux/alas2023-2025-1009.md) | Jun 4, 2025 |
| Linux | nodejs22-devel amzn 2023 | 1:22.16.0-1.amzn2023.0.1 | [ALAS2023-2025-1009](https://patchblox.com/security/data/fix/linux/alas2023-2025-1009.md) | Jun 4, 2025 |
| Linux | nodejs22-docs amzn 2023 | 1:22.16.0-1.amzn2023.0.1 | [ALAS2023-2025-1009](https://patchblox.com/security/data/fix/linux/alas2023-2025-1009.md) | Jun 4, 2025 |
| Linux | nodejs22-full-i18n amzn 2023 | 1:22.16.0-1.amzn2023.0.1 | [ALAS2023-2025-1009](https://patchblox.com/security/data/fix/linux/alas2023-2025-1009.md) | Jun 4, 2025 |
| Linux | nodejs22-libs amzn 2023 | 1:22.16.0-1.amzn2023.0.1 | [ALAS2023-2025-1009](https://patchblox.com/security/data/fix/linux/alas2023-2025-1009.md) | Jun 4, 2025 |
| Linux | nodejs22-libs-debuginfo amzn 2023 | 1:22.16.0-1.amzn2023.0.1 | [ALAS2023-2025-1009](https://patchblox.com/security/data/fix/linux/alas2023-2025-1009.md) | Jun 4, 2025 |
| Linux | nodejs22-npm amzn 2023 | 1:10.9.2-1.22.16.0.1.amzn2023.0.1 | [ALAS2023-2025-1009](https://patchblox.com/security/data/fix/linux/alas2023-2025-1009.md) | Jun 4, 2025 |
| Linux | v8-11.3-devel amzn 2023 | 3:11.3.244.8-1.20.19.2.1.amzn2023.0.1 | [ALAS2023-2025-1010](https://patchblox.com/security/data/fix/linux/alas2023-2025-1010.md) | Jun 4, 2025 |
| Linux | v8-12.4-devel amzn 2023 | 3:12.4.254.21-1.22.16.0.1.amzn2023.0.1 | [ALAS2023-2025-1009](https://patchblox.com/security/data/fix/linux/alas2023-2025-1009.md) | Jun 4, 2025 |

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