# re2c security updates

Patch Radar has 6 security fixes for re2c, closing 3 CVEs. The newest security fix is DEBIAN-CVE-2026-2903 (4.5.1-1), released February 22, 2026.

- Web page: https://patchblox.com/security/product/linux/re2c
- Platform: Linux
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [DEBIAN-CVE-2026-2903](https://patchblox.com/security/data/fix/linux/debian-cve-2026-2903.md) | Feb 22, 2026 | Debian 14 4.5.1-1 | Routine | 1 | 0 |
| [ALAS2023-2023-438](https://patchblox.com/security/data/fix/linux/alas2023-2023-438.md) | Nov 9, 2023 | amzn 2023 3.1-1.amzn2023.0.1 | Urgent | 1 | 0 |
| [DEBIAN-CVE-2022-23901](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23901.md) | Mar 29, 2022 | Debian 12.15 (bookworm) 3.0-1 | Urgent | 1 | 0 |
| [DEBIAN-CVE-2022-23901](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23901.md) | Mar 29, 2022 | Debian 13.5 (trixie) 3.0-1 | Urgent | 1 | 0 |
| [DEBIAN-CVE-2022-23901](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23901.md) | Mar 29, 2022 | Debian 14 3.0-1 | Urgent | 1 | 0 |
| [re2c 1.3-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-re2c-1.3-1ubuntu0.1.md) | Apr 20, 2020 | Ubuntu 20.04 LTS (focal) 1.3-1ubuntu0.1 | Routine | 1 | 0 |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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