CVE-2023-22486
cmark-gfm Quadratic complexity bug in handle_close_bracket may lead to a denial of service
02 Description
cmark-gfm Quadratic complexity bug in handle_close_bracket may lead to a denial of service
03 Exploitation and scoring
- Exploitation
- Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
- SSVC decision
- ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 1.10% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 65.6% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-01-24 02:30Z3 YR AGO
- Last updated
- 2025-03-10 21:20Z1 YR AGO
- Reserved
- 2022-12-29
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- Low (CVSS 3.5)
- CNA CVSS vector
- CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- Data version
- 5.1
- Document digest
- 8421abb75ee6b1a8dcb0375da37dbfe9fbc8a32b6cb6c5b0927b2386dfb9cba3
05 Affected products
06 References
07 Fixed in
Debian 12
- cmark-gfm No fix yet
- python-cmarkgfm No fix yet
- r-cran-commonmark No fix yet
- ruby-commonmarker No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- cmark-gfm Fixed in 0.29.0.gfm.13-1
- python-cmarkgfm Fixed in 2024.11.20-1
- r-cran-commonmark Fixed in 1.9.0-1
- ruby-commonmarker Fixed in 0.23.10-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- cmark-gfm Fixed in 0.29.0.gfm.13-1
- python-cmarkgfm Fixed in 2024.11.20-1
- r-cran-commonmark Fixed in 1.9.0-1
- ruby-commonmarker Fixed in 0.23.10-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- cmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- cmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- cmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- cmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- cmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- cmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- cmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- cmark-gfm Fixed in 0.29.0.gfm.0-4ubuntu0.1~esm1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 22.04 LTS
- cmark-gfm Fixed in 0.29.0.gfm.3-3ubuntu0.1~esm1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 24.04 LTS
- cmark-gfm Fixed in 0.29.0.gfm.6-6ubuntu0.24.04.1~esm1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.