MediumFix available
libxml2 — security advisory
An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value).
- Products
- libxml2
- Affected versions
- Not specified
- Fixed versions
- 2.10.4-r0
- CVEs
- CVE-2023-29469
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 14:57 UTC · Revision 1
Source evidence
An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value).
osv:ALPINE-CVE-2023-29469
libxml2
Fixed versions: 2.10.4-r0
libxml2
Fixed versions: 2.10.4-r0
libxml2
Fixed versions: 2.10.4-r0
libxml2
Fixed versions: 2.10.4-r0
libxml2
Fixed versions: 2.10.4-r0
libxml2
Fixed versions: 2.10.4-r0
libxml2
Fixed versions: 2.10.4-r0
libxml2
Fixed versions: 2.10.4-r0
Complete source record
{
"id": "63cbf8eaf42d3cc157e8fef895dbf59b4a8ff2df5da15ec346ee558d244a41ac",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-29469",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2023-29469",
"summary": "An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\\0' value).",
"evidence": "osv:ALPINE-CVE-2023-29469",
"products": [
{
"name": {
"value": "libxml2",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.10.4-r0",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libxml2",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.10.4-r0",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libxml2",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.10.4-r0",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libxml2",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.10.4-r0",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libxml2",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.10.4-r0",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libxml2",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.10.4-r0",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libxml2",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.10.4-r0",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libxml2",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.10.4-r0",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "ALPINE-CVE-2023-29469",
"aliases": [
"ALPINE-CVE-2023-29469"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.10.4-r0"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:apk/alpine/libxml2?arch=source",
"ecosystem": "Alpine:v3.17"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-29469.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.10.4-r0"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:apk/alpine/libxml2?arch=source",
"ecosystem": "Alpine:v3.18"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-29469.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.10.4-r0"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:apk/alpine/libxml2?arch=source",
"ecosystem": "Alpine:v3.19"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-29469.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.10.4-r0"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:apk/alpine/libxml2?arch=source",
"ecosystem": "Alpine:v3.20"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-29469.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.10.4-r0"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:apk/alpine/libxml2?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-29469.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.10.4-r0"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:apk/alpine/libxml2?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-29469.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.10.4-r0"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:apk/alpine/libxml2?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-29469.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.10.4-r0"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:apk/alpine/libxml2?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-29469.json"
},
"ecosystem_specific": {}
}
],
"modified": "2026-10-26T17:17:58.621196850Z",
"provider": "osv",
"upstream": [
"CVE-2023-29469"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2023-29469"
]
},
"related_cves": [
{
"value": "CVE-2023-29469",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 454425,
"published_at": "2023-04-24T21:15:09.23+00:00"
}