# CVE-2023-22485: r-cran-commonmark: cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C

CVE-2023-22485 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2023-22485, released January 24, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-22485
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0073
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 24, 2023

## Description

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior 0.29.0.gfm.7, a crafted markdown document can trigger an out-of-bounds read in the `validate_protocol` function. We believe this bug is harmless in practice, because the out-of-bounds read accesses `malloc` metadata without causing any visible damage.This vulnerability has been patched in 0.29.0.gfm.7.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cmark-gfm Debian 13.5 (trixie) | 0.29.0.gfm.13-1 | [DEBIAN-CVE-2023-22485](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22485.md) | Jan 24, 2023 |
| Linux | cmark-gfm Debian 14 | 0.29.0.gfm.13-1 | [DEBIAN-CVE-2023-22485](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22485.md) | Jan 24, 2023 |
| Linux | python-cmarkgfm Debian 13.5 (trixie) | 2024.11.20-1 | [DEBIAN-CVE-2023-22485](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22485.md) | Jan 24, 2023 |
| Linux | python-cmarkgfm Debian 14 | 2024.11.20-1 | [DEBIAN-CVE-2023-22485](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22485.md) | Jan 24, 2023 |
| Linux | r-cran-commonmark Debian 13.5 (trixie) | 1.9.0-1 | [DEBIAN-CVE-2023-22485](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22485.md) | Jan 24, 2023 |
| Linux | r-cran-commonmark Debian 14 | 1.9.0-1 | [DEBIAN-CVE-2023-22485](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22485.md) | Jan 24, 2023 |
| Linux | ruby-commonmarker Debian 13.5 (trixie) | 0.23.10-1 | [DEBIAN-CVE-2023-22485](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22485.md) | Jan 24, 2023 |
| Linux | ruby-commonmarker Debian 14 | 0.23.10-1 | [DEBIAN-CVE-2023-22485](https://patchblox.com/security/data/fix/linux/debian-cve-2023-22485.md) | Jan 24, 2023 |

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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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