MediumFix available
cmark-gfm, python-cmarkgfm and 2 more products — security advisory
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.
- Products
- cmark-gfm, python-cmarkgfm, r-cran-commonmark, ruby-commonmarker
- Affected versions
- 0.23.10-1, 0.23.6-1, 0.23.9-1, 0.29.0.gfm.13-1, 0.29.0.gfm.13-2, 0.29.0.gfm.13-3, 0.29.0.gfm.13-4, 0.29.0.gfm.13-7, 0.29.0.gfm.13-7.1, 0.29.0.gfm.6-6, 0.8.0-3, 1.8.1-1, 1.9.0-1, 1.9.1-1, 1.9.2-1, 1.9.2-2, 1.9.5-1, 2.0.0-1, 2.0.0-2, 2.0.0-3, 2.10.0-1, 2.10.0-2, 2.10.1-1, 2.8.3-1, 2.8.3-2, 2.8.3-3, 2.8.3-4, 2024.11.20-1, 2025.10.22-1, 2025.10.22-2
- Fixed versions
- 0.23.10-1, 0.29.0.gfm.13-1, 1.9.0-1, 2024.11.20-1
- CVEs
- CVE-2023-22485
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 15:34 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2023-22485
cmark-gfm
Fixed versions: Not specified
cmark-gfm
Fixed versions: 0.29.0.gfm.13-1
cmark-gfm
Fixed versions: 0.29.0.gfm.13-1
python-cmarkgfm
Fixed versions: Not specified
python-cmarkgfm
Fixed versions: 2024.11.20-1
python-cmarkgfm
Fixed versions: 2024.11.20-1
r-cran-commonmark
Fixed versions: Not specified
r-cran-commonmark
Fixed versions: 1.9.0-1
r-cran-commonmark
Fixed versions: 1.9.0-1
ruby-commonmarker
Fixed versions: Not specified
ruby-commonmarker
Fixed versions: 0.23.10-1
ruby-commonmarker
Fixed versions: 0.23.10-1
Complete source record
{
"id": "6b3ac3aa0e69d295fcdada5d75a57dde219bbdab58946953eca414f96e6e450e",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-22485",
"method": "structured",
"payload": {
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"title": "DEBIAN-CVE-2023-22485",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2023-22485",
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{
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{
"name": {
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"evidence": "/affected/7/package/name"
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/9/versions"
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{
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"evidence": "/affected/9/versions"
},
{
"value": "2.8.3-1",
"evidence": "/affected/9/versions"
},
{
"value": "2.8.3-2",
"evidence": "/affected/9/versions"
},
{
"value": "2.8.3-3",
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},
{
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},
{
"name": {
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"evidence": "/affected/10/package/name"
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{
"name": {
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"evidence": "/affected/11/package/name"
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"severity": "medium",
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"aliases": [
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"metrics": [
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"package": {
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],
"modified": "2026-10-26T18:01:09.010435364Z",
"provider": "osv",
"upstream": [
"CVE-2023-22485"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2023-22485"
]
},
"related_cves": [
{
"value": "CVE-2023-22485",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 455353,
"published_at": "2023-01-24T01:15:10.593+00:00"
}