# DSA-5570-1: nghttp2 security update

DSA-5570-1, released December 1, 2023, fixes 1 CVE in nghttp2. One of them is being exploited (CVE-2023-44487); 1 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/linux/dsa-5570-1
- Platform: Linux
- Released: Dec 1, 2023
- Priority: Patch now (Closes CVE-2023-44487, exploited (CISA KEV))
- CVEs: 1, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2023-44487

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [nghttp2](https://patchblox.com/security/data/product/linux/nghttp2.md) | Debian 11.6 (bullseye) | 1.43.0-1+deb11u1 |
| [nghttp2](https://patchblox.com/security/data/product/linux/nghttp2.md) | Debian 12.15 (bookworm) | 1.52.0-1+deb12u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-44487](https://patchblox.com/security/data/cve/CVE-2023-44487.md) | Patch now | MITRE: CVE-2023-44487 HTTP/2 Rapid Reset Attack | 7.5 | 1.0000 | CISA KEV |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo