python3.11: Fix of 5 CVEs
- CVE-2026-87910: tarfile: skip a link member when the extraction filter returns None for its hardlink-extraction fallback instead of ignoring the filter result - CVE-2026-17084: stringprep: build the RFC 3454 B.2/B.3 tables from Unicode 3.2.0 data so IDNA 2003 encoding of newly case-folding characters no longer depends on the interpreter's Unicode version - CVE-2026-15310: zipfile: bound the output of each bzip2/LZMA decompress() call so a small crafted member cannot trigger an unbounded allocation - CVE-2026-9669: bz2: refuse to reuse a BZ2Decompressor after a decompression error, so retrying with the same object can no longer resume from an invalid internal state and write out of bounds - CVE-2026-11972: tarfile: stop the streaming-mode seek() loop at EOF so a member header declaring a huge size no longer makes parsing take exponentially longer
- Products
- python3.11, python3.11-debug, python3.11-devel, python3.11-idle, python3.11-libs, python3.11-test, python3.11-tkinter
- Affected versions
- Not specified
- Fixed versions
- 3.11.11-2.el9_6.2.tuxcare.els17
- CVEs
- CVE-2026-11972, CVE-2026-15310, CVE-2026-17084, CVE-2026-87910, CVE-2026-9669
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:52 UTC · Revision 1
Source evidence
- CVE-2026-87910: tarfile: skip a link member when the extraction filter returns None for its hardlink-extraction fallback instead of ignoring the filter result - CVE-2026-17084: stringprep: build the RFC 3454 B.2/B.3 tables from Unicode 3.2.0 data so IDNA 2003 encoding of newly case-folding characters no longer depends on the interpreter's Unicode version - CVE-2026-15310: zipfile: bound the output of each bzip2/LZMA decompress() call so a small crafted member cannot trigger an unbounded allocation - CVE-2026-9669: bz2: refuse to reuse a BZ2Decompressor after a decompression error, so retrying with the same object can no longer resume from an invalid internal state and write out of bounds - CVE-2026-11972: tarfile: stop the streaming-mode seek() loop at EOF so a member header declaring a huge size no longer makes parsing take exponentially longer
osv:CLSA-2026-1789735614
python3.11
Fixed versions: 3.11.11-2.el9_6.2.tuxcare.els17
python3.11-debug
Fixed versions: 3.11.11-2.el9_6.2.tuxcare.els17
python3.11-devel
Fixed versions: 3.11.11-2.el9_6.2.tuxcare.els17
python3.11-idle
Fixed versions: 3.11.11-2.el9_6.2.tuxcare.els17
python3.11-libs
Fixed versions: 3.11.11-2.el9_6.2.tuxcare.els17
python3.11-test
Fixed versions: 3.11.11-2.el9_6.2.tuxcare.els17
python3.11-tkinter
Fixed versions: 3.11.11-2.el9_6.2.tuxcare.els17
Complete source record
{
"id": "3565a4d4944a7c742330bf388d7c09c2b4f8f9c6725a1f40d3a183083bc0f1e2",
"url": "https://osv.dev/vulnerability/CLSA-2026-1789735614",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "python3.11: Fix of 5 CVEs",
"summary": "- CVE-2026-87910: tarfile: skip a link member when the extraction filter returns None for its hardlink-extraction fallback instead of ignoring the filter result - CVE-2026-17084: stringprep: build the RFC 3454 B.2/B.3 tables from Unicode 3.2.0 data so IDNA 2003 encoding of newly case-folding characters no longer depends on the interpreter's Unicode version - CVE-2026-15310: zipfile: bound the output of each bzip2/LZMA decompress() call so a small crafted member cannot trigger an unbounded allocation - CVE-2026-9669: bz2: refuse to reuse a BZ2Decompressor after a decompression error, so retrying with the same object can no longer resume from an invalid internal state and write out of bounds - CVE-2026-11972: tarfile: stop the streaming-mode seek() loop at EOF so a member header declaring a huge size no longer makes parsing take exponentially longer",
"evidence": "osv:CLSA-2026-1789735614",
"products": [
{
"name": {
"value": "python3.11",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/1/package/name"
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"evidence": "/affected/1/ranges"
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"affected_versions": []
},
{
"name": {
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"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/3/ranges"
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"affected_versions": []
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.11-test",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.11.11-2.el9_6.2.tuxcare.els17",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.11-tkinter",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1789735614",
"aliases": [
"CLSA-2026-1789735614"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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{
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}
]
}
],
"package": {
"name": "python3.11",
"purl": "pkg:rpm/tuxcare/python3.11?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789735614.json"
}
},
{
"ranges": [
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"events": [
{
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},
{
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}
]
}
],
"package": {
"name": "python3.11-debug",
"purl": "pkg:rpm/tuxcare/python3.11-debug?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789735614.json"
}
},
{
"ranges": [
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],
"package": {
"name": "python3.11-devel",
"purl": "pkg:rpm/tuxcare/python3.11-devel?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
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}
},
{
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],
"package": {
"name": "python3.11-idle",
"purl": "pkg:rpm/tuxcare/python3.11-idle?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
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}
},
{
"ranges": [
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{
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}
]
}
],
"package": {
"name": "python3.11-libs",
"purl": "pkg:rpm/tuxcare/python3.11-libs?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789735614.json"
}
},
{
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],
"package": {
"name": "python3.11-test",
"purl": "pkg:rpm/tuxcare/python3.11-test?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789735614.json"
}
},
{
"ranges": [
{
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{
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}
]
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],
"package": {
"name": "python3.11-tkinter",
"purl": "pkg:rpm/tuxcare/python3.11-tkinter?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789735614.json"
}
}
],
"modified": "2026-10-26T09:43:37.758888416Z",
"provider": "osv",
"upstream": [
"CVE-2026-11972",
"CVE-2026-15310",
"CVE-2026-17084",
"CVE-2026-87910",
"CVE-2026-9669"
],
"references": [
"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1789735614.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-11972",
"https://nvd.nist.gov/vuln/detail/CVE-2026-15310",
"https://nvd.nist.gov/vuln/detail/CVE-2026-17084",
"https://nvd.nist.gov/vuln/detail/CVE-2026-87910",
"https://nvd.nist.gov/vuln/detail/CVE-2026-9669"
]
},
"related_cves": [
{
"value": "CVE-2026-11972",
"evidence": "/upstream"
},
{
"value": "CVE-2026-15310",
"evidence": "/upstream"
},
{
"value": "CVE-2026-17084",
"evidence": "/upstream"
},
{
"value": "CVE-2026-87910",
"evidence": "/upstream"
},
{
"value": "CVE-2026-9669",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 450040,
"published_at": "2026-09-18T12:47:09+00:00"
}