Unrated
Withdrawn security advisory
In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- Not specified
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 10:44 UTC · Revision 1
Source evidence
In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.
osv:UBUNTU-CVE-2026-86137
libxml2
Fixed versions: Not specified
libxml2
Fixed versions: Not specified
libxml2
Fixed versions: Not specified
libxml2
Fixed versions: Not specified
libxml2
Fixed versions: Not specified
libxml2
Fixed versions: Not specified
libxml2
Fixed versions: Not specified
Complete source record
{
"id": "5dd1611fddd8b52a9b7a10afd2a561c4ea73b170599ab258634f0f18a2022d3b",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-86137",
"method": "structured",
"payload": {
"kind": "withdrawal",
"title": "UBUNTU-CVE-2026-86137",
"summary": "In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.",
"evidence": "osv:UBUNTU-CVE-2026-86137",
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{
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{
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"evidence": "/affected/0/versions"
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{
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{
"name": {
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},
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{
"value": "2.9.2+zdfsg1-4",
"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
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{
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{
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{
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{
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{
"value": "2.9.3+dfsg1-1ubuntu0.7+esm4",
"evidence": "/affected/1/versions"
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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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{
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}
]
},
{
"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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{
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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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{
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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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{
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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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{
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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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},
{
"name": {
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},
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},
{
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"evidence": "/affected/6/versions"
},
{
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"evidence": "/affected/6/versions"
},
{
"value": "2.15.1+dfsg-0.4",
"evidence": "/affected/6/versions"
},
{
"value": "2.15.1+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "2.15.1+dfsg-2",
"evidence": "/affected/6/versions"
},
{
"value": "2.15.1+dfsg-2ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "2.15.1+dfsg-2ubuntu2",
"evidence": "/affected/6/versions"
},
{
"value": "2.15.2+dfsg-0.1",
"evidence": "/affected/6/versions"
},
{
"value": "2.15.2+dfsg-0.1ubuntu0.1",
"evidence": "/affected/6/versions"
},
{
"value": "2.15.2+dfsg-0.1ubuntu0.2",
"evidence": "/affected/6/versions"
},
{
"value": "2.15.2+dfsg-0.1ubuntu0.3",
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}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-86137",
"aliases": [
"UBUNTU-CVE-2026-86137"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:deb/ubuntu/libxml2?arch=source&distro=esm-infra-legacy%2Ftrusty",
"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
"versions": [
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"2.9.1+dfsg1-3ubuntu4",
"2.9.1+dfsg1-3ubuntu4.1",
"2.9.1+dfsg1-3ubuntu4.2",
"2.9.1+dfsg1-3ubuntu4.3",
"2.9.1+dfsg1-3ubuntu4.4",
"2.9.1+dfsg1-3ubuntu4.5",
"2.9.1+dfsg1-3ubuntu4.6",
"2.9.1+dfsg1-3ubuntu4.7",
"2.9.1+dfsg1-3ubuntu4.8",
"2.9.1+dfsg1-3ubuntu4.9",
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"2.9.1+dfsg1-3ubuntu4.12",
"2.9.1+dfsg1-3ubuntu4.13",
"2.9.1+dfsg1-3ubuntu4.13+esm1",
"2.9.1+dfsg1-3ubuntu4.13+esm2",
"2.9.1+dfsg1-3ubuntu4.13+esm3",
"2.9.1+dfsg1-3ubuntu4.13+esm4",
"2.9.1+dfsg1-3ubuntu4.13+esm5",
"2.9.1+dfsg1-3ubuntu4.13+esm6",
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"2.9.1+dfsg1-3ubuntu4.13+esm9",
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"modified": "2026-10-09T07:45:03.021459106Z",
"provider": "osv",
"upstream": [
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],
"references": [
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"https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1099"
]
},
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"value": "CVE-2026-86137",
"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 108952,
"published_at": "2026-09-05T05:17:00+00:00"
}