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Vulnerabilities

Vulnerability · RSEC-2023-8

Denial of Service (DoS) vulnerabilities

Published Oct 6, 2023 · catalog updated May 19, 2025 · Denial of Service (DoS)

Open the advisory

Exploitation likelihood is not on this record for RSEC-2023-8. A missing EPSS score is not a low risk. Compare Denial of Service (DoS) with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Denial of Service (DoS)).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
CRAN commonmark

cmark-gfm, GitHub's extended version of the CommonMark library in C, suffers from multiple vulnerabilities affecting versions prior to 0.29.0.gfm.12. Various issues, including polynomial time complexity in multiple components like autolink extension, handle_close_bracket, and parsing of certain text patterns (leading , , ), may lead to unbounded resource exhaustion and denial of service. An out-of-bounds read in the function was also identified but is considered less harmful. Patches are available in versions 0.29.0.gfm.7, 0.29.0.gfm.10, and 0.29.0.gfm.12. Upgrading is advised, and users unable to upgrade should validate input from trusted sources.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • CRAN commonmark0.2 → 1.9.2

How to fix RSEC-2023-8

  • Recommended remediation

    A patch or advisory reference is linked. Open the original publisher for availability by product version.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for RSEC-2023-8. A missing EPSS score is not a low risk. Compare Denial of Service (DoS) with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0.2 → 1.9.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 6, 2023 · OpenSSF OSV / OSV Scanner

    Detected

    cmark-gfm, GitHub's extended version of the CommonMark library in C, suffers from multiple vulnerabilities affecting versions prior to 0.29.0.gfm.12. Various issues, including polynomial time complexity in multiple components like autolink extension, handle_close_bracket, and parsing of certain text patterns (leading , , ), may lead to unbounded resource exhaustion and denial of service. An out-of

  2. May 19, 2025 · OpenSSF OSV / OSV Scanner

    Fix available

    commonmark fixed in 1.9.2

  3. May 19, 2025 · OpenSSF OSV / OSV Scanner

    Fix available

    commonmark fixed in 1.9.2

  4. May 19, 2025 · OpenSSF OSV / OSV Scanner

    Updated

    cmark-gfm, GitHub's extended version of the CommonMark library in C, suffers from multiple vulnerabilities affecting versions prior to 0.29.0.gfm.12. Various issues, including polynomial time complexity in multiple components like autolink extension, handle_close_bracket, and parsing of certain text patterns (leading , , ), may lead to unbounded resource exhaustion and denial of service. An out-of

Sources

References

Freshness

Last verified in this catalog May 19, 2025. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.