cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c 'print("![l"* 100000 + "\n")' | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension.

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Advisories
Source ID Title
EUVD EUVD EUVD-2022-41748 cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c 'print("![l"* 100000 + "\n")' | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension.
Ubuntu USN Ubuntu USN USN-7319-1 cmark-gfm vulnerabilities
Fixes

Solution

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Workaround

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History

Wed, 23 Apr 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-04-23T17:10:11.051Z

Reserved: 2022-09-02T00:00:00.000Z

Link: CVE-2022-39209

cve-icon Vulnrichment

Updated: 2024-08-03T12:00:42.513Z

cve-icon NVD

Status : Modified

Published: 2022-09-15T18:15:12.260

Modified: 2024-11-21T07:17:47.487

Link: CVE-2022-39209

cve-icon Redhat

Severity : Moderate

Publid Date: 2022-09-15T00:00:00Z

Links: CVE-2022-39209 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses