Fix of 8 CVEs
- CVE-2021-3517.patch: validate UTF8 in xmlEncodeEntities - CVE-2021-3518.patch: fix user-after-free with 'xmllint --xinclude --dropdtd' - CVE-2021-3537.patch: propagate error in xmlParseElementChildrenContentDeclPriv - CVE-2021-3541.patch: parser fix for the billion laughs attack - CVE-2021-3516.patch: fix use-after-free with 'xmllint --html --push' - CVE-2017-8872.patch: free input buffer in xmlHaltParser - CVE-2019-20388.patch: fix memory leak in xmlSchemaValidateStream - CVE-2020-24977.patch: fix out-of-bounds read with 'xmllint --htmlout'
- Products
- libxml2, libxml2-devel, libxml2-python, libxml2-static
- Affected versions
- Not specified
- Fixed versions
- 2.7.6-21.el6_8.1.tuxcare.els1
- CVEs
- CVE-2017-8872, CVE-2019-20388, CVE-2020-24977, CVE-2021-3516, CVE-2021-3517, CVE-2021-3518, CVE-2021-3537, CVE-2021-3541
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 13:52 UTC · Revision 1
Source evidence
- CVE-2021-3517.patch: validate UTF8 in xmlEncodeEntities - CVE-2021-3518.patch: fix user-after-free with 'xmllint --xinclude --dropdtd' - CVE-2021-3537.patch: propagate error in xmlParseElementChildrenContentDeclPriv - CVE-2021-3541.patch: parser fix for the billion laughs attack - CVE-2021-3516.patch: fix use-after-free with 'xmllint --html --push' - CVE-2017-8872.patch: free input buffer in xmlHaltParser - CVE-2019-20388.patch: fix memory leak in xmlSchemaValidateStream - CVE-2020-24977.patch: fix out-of-bounds read with 'xmllint --htmlout'
osv:CLSA-2022-1641903536
libxml2
Fixed versions: 2.7.6-21.el6_8.1.tuxcare.els1
libxml2-devel
Fixed versions: 2.7.6-21.el6_8.1.tuxcare.els1
libxml2-python
Fixed versions: 2.7.6-21.el6_8.1.tuxcare.els1
libxml2-static
Fixed versions: 2.7.6-21.el6_8.1.tuxcare.els1
Complete source record
{
"id": "49202fde8e6e83c31142a60c3171c9fccfd4158f1597213e806f267b390a0e60",
"url": "https://osv.dev/vulnerability/CLSA-2022-1641903536",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix of 8 CVEs",
"summary": "- CVE-2021-3517.patch: validate UTF8 in xmlEncodeEntities - CVE-2021-3518.patch: fix user-after-free with 'xmllint --xinclude --dropdtd' - CVE-2021-3537.patch: propagate error in xmlParseElementChildrenContentDeclPriv - CVE-2021-3541.patch: parser fix for the billion laughs attack - CVE-2021-3516.patch: fix use-after-free with 'xmllint --html --push' - CVE-2017-8872.patch: free input buffer in xmlHaltParser - CVE-2019-20388.patch: fix memory leak in xmlSchemaValidateStream - CVE-2020-24977.patch: fix out-of-bounds read with 'xmllint --htmlout'",
"evidence": "osv:CLSA-2022-1641903536",
"products": [
{
"name": {
"value": "libxml2",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.7.6-21.el6_8.1.tuxcare.els1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libxml2-devel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.7.6-21.el6_8.1.tuxcare.els1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libxml2-python",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.7.6-21.el6_8.1.tuxcare.els1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libxml2-static",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.7.6-21.el6_8.1.tuxcare.els1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2022-1641903536",
"aliases": [
"CLSA-2022-1641903536"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.6-21.el6_8.1.tuxcare.els1"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:rpm/tuxcare/libxml2?distro=centos-6",
"ecosystem": "TuxCare:CentOS:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2022-1641903536.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.6-21.el6_8.1.tuxcare.els1"
}
]
}
],
"package": {
"name": "libxml2-devel",
"purl": "pkg:rpm/tuxcare/libxml2-devel?distro=centos-6",
"ecosystem": "TuxCare:CentOS:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2022-1641903536.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.6-21.el6_8.1.tuxcare.els1"
}
]
}
],
"package": {
"name": "libxml2-python",
"purl": "pkg:rpm/tuxcare/libxml2-python?distro=centos-6",
"ecosystem": "TuxCare:CentOS:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2022-1641903536.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.6-21.el6_8.1.tuxcare.els1"
}
]
}
],
"package": {
"name": "libxml2-static",
"purl": "pkg:rpm/tuxcare/libxml2-static?distro=centos-6",
"ecosystem": "TuxCare:CentOS:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2022-1641903536.json"
}
}
],
"modified": "2026-10-21T10:47:15.789020695Z",
"provider": "osv",
"upstream": [
"CVE-2017-8872",
"CVE-2019-20388",
"CVE-2020-24977",
"CVE-2021-3516",
"CVE-2021-3517",
"CVE-2021-3518",
"CVE-2021-3537",
"CVE-2021-3541"
],
"references": [
"https://errata.cloudlinux.com/els6/CLSA-2022-1641903536.html"
]
},
"related_cves": [
{
"value": "CVE-2017-8872",
"evidence": "/upstream"
},
{
"value": "CVE-2019-20388",
"evidence": "/upstream"
},
{
"value": "CVE-2020-24977",
"evidence": "/upstream"
},
{
"value": "CVE-2021-3516",
"evidence": "/upstream"
},
{
"value": "CVE-2021-3517",
"evidence": "/upstream"
},
{
"value": "CVE-2021-3518",
"evidence": "/upstream"
},
{
"value": "CVE-2021-3537",
"evidence": "/upstream"
},
{
"value": "CVE-2021-3541",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 392325,
"published_at": "2022-01-11T12:18:56+00:00"
}