# CVE-2024-49769: python3-waitress: Waitress is a Web Server Gateway Interface server for Python 2 and 3

CVE-2024-49769 is fixed in 4 products on 1 platform, first by python3-waitress 1.4.1-1ubuntu0.2, released October 29, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-49769
- Priority: High
- CVSS: 7.5 (Medium)
- EPSS: 0.0138
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 29, 2024

## Description

Waitress is a Web Server Gateway Interface server for Python 2 and 3. Whena remote client closes the connection before waitress has had theopportunity to call getpeername() waitress won't correctly clean up theconnection leading to the main thread attempting to write to a socket thatno longer exists, but not removing it from the list of sockets to attemptto process. This leads to a busy-loop calling the write function. A remoteattacker could run waitress out of available sockets with very littleresources required. Waitress 3.0.1 contains fixes that remove the racecondition.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-waitress sles 15.6 | 1.4.3-150000.3.9.1 | [SUSE-SU-2024:4107-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4107-1.md) | Nov 28, 2024 |
| Linux | python-waitress-doc sles 15.6 | 2.1.2-150400.12.7.1 | [SUSE-SU-2024:3876-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3876-1.md) | Nov 1, 2024 |
| Linux | python3-waitress Ubuntu 20.04 LTS (focal) | 1.4.1-1ubuntu0.2 | [python3-waitress 1.4.1-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-waitress-1.4.1-1ubuntu0.2.md) | Oct 29, 2024 |
| Linux | python3-waitress Ubuntu 22.04.1 LTS (jammy) | 1.4.4-1.1ubuntu1.1 | [python3-waitress 1.4.4-1.1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-waitress-1.4.4-1.1ubuntu1.1.md) | Oct 29, 2024 |
| Linux | python3-waitress Ubuntu 24.04.5 LTS (noble) | 2.1.2-2ubuntu0.1~esm1 | [python3-waitress 2.1.2-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-waitress-2.1.2-2ubuntu0.1-esm1.md) | Oct 29, 2024 |
| Linux | python3-waitress Ubuntu 24.10 (oracular) | 3.0.0-1ubuntu0.1 | [python3-waitress 3.0.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-python3-waitress-3.0.0-1ubuntu0.1.md) | Jan 16, 2026 |
| Linux | python3-waitress amzn 2023 | 2.1.2-1.amzn2023.0.3 | [ALAS2023-2024-773](https://patchblox.com/security/data/fix/linux/alas2023-2024-773.md) | Dec 5, 2024 |
| Linux | waitress Debian 11.6 (bullseye) | 1.4.4-1.1+deb11u2 | [DLA-3955-1](https://patchblox.com/security/data/fix/linux/dla-3955-1.md) | Nov 16, 2024 |
| Linux | waitress Debian 12.15 (bookworm) | 2.1.2-2+deb12u1 | [DEBIAN-CVE-2024-49769](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49769.md) | Oct 29, 2024 |
| Linux | waitress Debian 13.5 (trixie) | 3.0.1-1 | [DEBIAN-CVE-2024-49769](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49769.md) | Oct 29, 2024 |
| Linux | waitress Debian 14 | 3.0.1-1 | [DEBIAN-CVE-2024-49769](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49769.md) | Oct 29, 2024 |

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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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