{"id":"CVE-2023-22485","summary":"cmark-gfm out-of-bounds read in validate_protocol","details":"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.","aliases":["GHSA-c944-cv5f-hpvr"],"modified":"2026-04-10T04:11:08.384708Z","published":"2023-01-24T00:26:57.671Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/22xxx/CVE-2023-22485.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/22xxx/CVE-2023-22485.json"},{"type":"ADVISORY","url":"https://github.com/github/cmark-gfm/security/advisories/GHSA-c944-cv5f-hpvr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-22485"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/github/cmark-gfm","events":[{"introduced":"0"},{"fixed":"57d5e093ef801f54bf4174c900f7a863599bb47d"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"0.29.0.gfm.7"}]}}],"versions":["0.27.1.gfm.2","0.27.1.gfm.3","0.27.1.gfm.4","0.28.0.gfm.10","0.28.0.gfm.11","0.28.0.gfm.5","0.28.0.gfm.6","0.28.0.gfm.7","0.28.0.gfm.8","0.28.0.gfm.9","0.28.3.gfm.12","0.28.3.gfm.13","0.28.3.gfm.14","0.28.3.gfm.15","0.28.3.gfm.16","0.28.3.gfm.17","0.28.3.gfm.18","0.28.3.gfm.19","0.28.3.gfm.20","0.29.0.gfm.0","0.29.0.gfm.1","0.29.0.gfm.2","0.29.0.gfm.3","0.29.0.gfm.4","0.29.0.gfm.5","0.29.0.gfm.6"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-22485.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}