Update of python
- make the weak XML_SetHashSalt16Bytes reference in pyexpat unversioned (.symver): linked against the tuxcare libexpat it was stamped with the EXPAT_2_0_1_RH version node, and on el6 glibc 2.12 a versioned reference whose provider lacks the symbol is a fatal relocation error even for a weak symbol, so pyexpat.so failed to load (breaking yum with "ImportError: No module named cElementTree") on hosts whose /lib64/libexpat.so.1 predates the els10 backport, e.g. a third-party expat package - drop the runtime Requires on expat >= 2.0.1-13.el6_8.tuxcare.els10: a third-party package providing a higher expat NEVRA satisfies it without providing the ABI, and with the truly-weak unversioned reference pyexpat degrades gracefully to XML_SetHashSalt when the symbol is absent
- Products
- python, python-devel, python-libs, python-test, python-tools, tkinter
- Affected versions
- Not specified
- Fixed versions
- 2.6.6-70.el6.tuxcare.els25
- CVEs
- Not specified
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 10:59 UTC · Revision 1
Source evidence
- make the weak XML_SetHashSalt16Bytes reference in pyexpat unversioned (.symver): linked against the tuxcare libexpat it was stamped with the EXPAT_2_0_1_RH version node, and on el6 glibc 2.12 a versioned reference whose provider lacks the symbol is a fatal relocation error even for a weak symbol, so pyexpat.so failed to load (breaking yum with "ImportError: No module named cElementTree") on hosts whose /lib64/libexpat.so.1 predates the els10 backport, e.g. a third-party expat package - drop the runtime Requires on expat >= 2.0.1-13.el6_8.tuxcare.els10: a third-party package providing a higher expat NEVRA satisfies it without providing the ABI, and with the truly-weak unversioned reference pyexpat degrades gracefully to XML_SetHashSalt when the symbol is absent
osv:CLSA-2026-1783853491
python
Fixed versions: 2.6.6-70.el6.tuxcare.els25
python-devel
Fixed versions: 2.6.6-70.el6.tuxcare.els25
python-libs
Fixed versions: 2.6.6-70.el6.tuxcare.els25
python-test
Fixed versions: 2.6.6-70.el6.tuxcare.els25
python-tools
Fixed versions: 2.6.6-70.el6.tuxcare.els25
tkinter
Fixed versions: 2.6.6-70.el6.tuxcare.els25
Complete source record
{
"id": "372796f78d99468768f110813cab14980a466e7cd8c5a58fe4a7eb943413aee6",
"url": "https://osv.dev/vulnerability/CLSA-2026-1783853491",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Update of python",
"summary": "- make the weak XML_SetHashSalt16Bytes reference in pyexpat unversioned (.symver): linked against the tuxcare libexpat it was stamped with the EXPAT_2_0_1_RH version node, and on el6 glibc 2.12 a versioned reference whose provider lacks the symbol is a fatal relocation error even for a weak symbol, so pyexpat.so failed to load (breaking yum with \"ImportError: No module named cElementTree\") on hosts whose /lib64/libexpat.so.1 predates the els10 backport, e.g. a third-party expat package - drop the runtime Requires on expat >= 2.0.1-13.el6_8.tuxcare.els10: a third-party package providing a higher expat NEVRA satisfies it without providing the ABI, and with the truly-weak unversioned reference pyexpat degrades gracefully to XML_SetHashSalt when the symbol is absent",
"evidence": "osv:CLSA-2026-1783853491",
"products": [
{
"name": {
"value": "python",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.6-70.el6.tuxcare.els25",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python-devel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.6-70.el6.tuxcare.els25",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python-libs",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.6-70.el6.tuxcare.els25",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python-test",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.6-70.el6.tuxcare.els25",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python-tools",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.6-70.el6.tuxcare.els25",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tkinter",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.6-70.el6.tuxcare.els25",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1783853491",
"aliases": [
"CLSA-2026-1783853491"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.6-70.el6.tuxcare.els25"
}
]
}
],
"package": {
"name": "python",
"purl": "pkg:rpm/tuxcare/python?distro=centos-6",
"ecosystem": "TuxCare:CentOS:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2026-1783853491.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.6-70.el6.tuxcare.els25"
}
]
}
],
"package": {
"name": "python-devel",
"purl": "pkg:rpm/tuxcare/python-devel?distro=centos-6",
"ecosystem": "TuxCare:CentOS:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2026-1783853491.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.6-70.el6.tuxcare.els25"
}
]
}
],
"package": {
"name": "python-libs",
"purl": "pkg:rpm/tuxcare/python-libs?distro=centos-6",
"ecosystem": "TuxCare:CentOS:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2026-1783853491.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.6-70.el6.tuxcare.els25"
}
]
}
],
"package": {
"name": "python-test",
"purl": "pkg:rpm/tuxcare/python-test?distro=centos-6",
"ecosystem": "TuxCare:CentOS:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2026-1783853491.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.6-70.el6.tuxcare.els25"
}
]
}
],
"package": {
"name": "python-tools",
"purl": "pkg:rpm/tuxcare/python-tools?distro=centos-6",
"ecosystem": "TuxCare:CentOS:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2026-1783853491.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.6-70.el6.tuxcare.els25"
}
]
}
],
"package": {
"name": "tkinter",
"purl": "pkg:rpm/tuxcare/tkinter?distro=centos-6",
"ecosystem": "TuxCare:CentOS:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2026-1783853491.json"
}
}
],
"modified": "2026-10-26T09:31:39.407943925Z",
"provider": "osv",
"references": [
"https://errata.tuxcare.com/els_os/centos6els/CLSA-2026-1783853491.html"
]
},
"related_cves": [],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 448002,
"published_at": "2026-07-12T19:17:08+00:00"
}