CVE-2023-22486

cmark-gfm: cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and renderinglibrary and program in C

CVE-2023-22486 is fixed in 10 products on 1 platform, first by DEBIAN-CVE-2023-22486, released January 26, 2023. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.5
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0112
66th percentile

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and renderinglibrary and program in C. Versions prior to 0.29.0.gfm.7 contain apolynomial time complexity issue in handle_close_bracket that may lead tounbounded resource exhaustion and subsequent denial of service. Thisvulnerability has been patched in 0.29.0.gfm.7.

Where it's fixed

ProductFixed inFixReleased
Linux
cmark-gfm · Debian 13.5 (trixie) 0.29.0.gfm.13-1 DEBIAN-CVE-2023-22486 Jan 26, 2023
cmark-gfm · Debian 14 0.29.0.gfm.13-1 DEBIAN-CVE-2023-22486 Jan 26, 2023
cmark-gfm · Ubuntu 20.04 LTS (focal) 0.29.0.gfm.0-4ubuntu0.1~esm1 cmark-gfm 0.29.0.gfm.0-4ubuntu0.1~esm1 Mar 31, 2023
cmark-gfm · Ubuntu 22.04.1 LTS (jammy) 0.29.0.gfm.3-3ubuntu0.1~esm1 cmark-gfm 0.29.0.gfm.3-3ubuntu0.1~esm1 Mar 31, 2023
cmark-gfm · Ubuntu 24.04.5 LTS (noble) 0.29.0.gfm.6-6ubuntu0.24.04.1~esm1 cmark-gfm 0.29.0.gfm.6-6ubuntu0.24.04.1~esm1 Mar 31, 2023
cmark-gfm · Ubuntu 24.10 (oracular) 0.29.0.gfm.6-6ubuntu0.24.10.1 cmark-gfm 0.29.0.gfm.6-6ubuntu0.24.10.1 Jan 16, 2026
libcmark-gfm-extensions0 · Ubuntu 20.04 LTS (focal) 0.29.0.gfm.0-4ubuntu0.1~esm1 libcmark-gfm-extensions0 0.29.0.gfm.0-4ubuntu0.1~esm1 Mar 31, 2023
libcmark-gfm-extensions0.29.0.gfm.3 · Ubuntu 22.04.1 LTS (jammy) 0.29.0.gfm.3-3ubuntu0.1~esm1 libcmark-gfm-extensions0.29.0.gfm.3 0.29.0.gfm.3-3ubuntu0.1~esm1 Mar 31, 2023
libcmark-gfm-extensions0.29.0.gfm.6 · Ubuntu 24.04.5 LTS (noble) 0.29.0.gfm.6-6ubuntu0.24.04.1~esm1 libcmark-gfm-extensions0.29.0.gfm.6 0.29.0.gfm.6-6ubuntu0.24.04.1~esm1 Mar 31, 2023
libcmark-gfm-extensions0.29.0.gfm.6 · Ubuntu 24.10 (oracular) 0.29.0.gfm.6-6ubuntu0.24.10.1 libcmark-gfm-extensions0.29.0.gfm.6 0.29.0.gfm.6-6ubuntu0.24.10.1 Jan 16, 2026
libcmark-gfm0 · Ubuntu 20.04 LTS (focal) 0.29.0.gfm.0-4ubuntu0.1~esm1 libcmark-gfm0 0.29.0.gfm.0-4ubuntu0.1~esm1 Mar 31, 2023
libcmark-gfm0.29.0.gfm.3 · Ubuntu 22.04.1 LTS (jammy) 0.29.0.gfm.3-3ubuntu0.1~esm1 libcmark-gfm0.29.0.gfm.3 0.29.0.gfm.3-3ubuntu0.1~esm1 Mar 31, 2023
libcmark-gfm0.29.0.gfm.6 · Ubuntu 24.04.5 LTS (noble) 0.29.0.gfm.6-6ubuntu0.24.04.1~esm1 libcmark-gfm0.29.0.gfm.6 0.29.0.gfm.6-6ubuntu0.24.04.1~esm1 Mar 31, 2023
libcmark-gfm0.29.0.gfm.6 · Ubuntu 24.10 (oracular) 0.29.0.gfm.6-6ubuntu0.24.10.1 libcmark-gfm0.29.0.gfm.6 0.29.0.gfm.6-6ubuntu0.24.10.1 Jan 16, 2026
python-cmarkgfm · Debian 13.5 (trixie) 2024.11.20-1 DEBIAN-CVE-2023-22486 Jan 26, 2023
python-cmarkgfm · Debian 14 2024.11.20-1 DEBIAN-CVE-2023-22486 Jan 26, 2023
r-cran-commonmark · Debian 13.5 (trixie) 1.9.0-1 DEBIAN-CVE-2023-22486 Jan 26, 2023
r-cran-commonmark · Debian 14 1.9.0-1 DEBIAN-CVE-2023-22486 Jan 26, 2023
ruby-commonmarker · Debian 13.5 (trixie) 0.23.10-1 DEBIAN-CVE-2023-22486 Jan 26, 2023
ruby-commonmarker · Debian 14 0.23.10-1 DEBIAN-CVE-2023-22486 Jan 26, 2023

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