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Medium severity5.3NVD Advisory· Published Jan 24, 2023· Updated Jun 17, 2026

CVE-2023-22485

CVE-2023-22485

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.

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Affected products

3
  • GitHub/Cmark Gfm3 versions
    cpe:2.3:a:github:cmark-gfm:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:github:cmark-gfm:*:*:*:*:*:*:*:*range: <0.29.0.gfm.7
    • (no CPE)range: <0.29.0.gfm.7
    • (no CPE)range: < 0.29.0.gfm.7

Patches

Vulnerability mechanics

References

1

News mentions

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