UnratedFix available
Fix CVE(s): CVE-2026-9669
Type: advisorySources: OSV
* SECURITY UPDATE: out-of-bounds write via bz2 stream reuse after a decompression error (CVE-2026-9669) - debian/patches/CVE-2026-9669.patch: record the libbz2 error code on the BZ2Decompressor and BZ2File objects in Modules/bz2module.c and refuse every later decompress() or read() call, so BZ2_bzDecompress() is never re-entered on a stream libbz2 has already reported an error for; adds regression tests for both paths to Lib/test/test_bz2.py - CVE-2026-9669
- Products
- idle-python2.7, libpython2.7, libpython2.7-dev, libpython2.7-minimal, libpython2.7-stdlib, libpython2.7-testsuite, python2.7, python2.7-dev, python2.7-doc, python2.7-examples, python2.7-minimal
- Affected versions
- Not specified
- Fixed versions
- 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
- CVEs
- CVE-2026-9669
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:42 UTC · Revision 1
Source evidence
* SECURITY UPDATE: out-of-bounds write via bz2 stream reuse after a decompression error (CVE-2026-9669) - debian/patches/CVE-2026-9669.patch: record the libbz2 error code on the BZ2Decompressor and BZ2File objects in Modules/bz2module.c and refuse every later decompress() or read() call, so BZ2_bzDecompress() is never re-entered on a stream libbz2 has already reported an error for; adds regression tests for both paths to Lib/test/test_bz2.py - CVE-2026-9669
osv:CLSA-2026-1789748541
idle-python2.7
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
libpython2.7
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
libpython2.7-dev
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
libpython2.7-minimal
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
libpython2.7-stdlib
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
libpython2.7-testsuite
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
python2.7
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
python2.7-dev
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
python2.7-doc
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
python2.7-examples
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
python2.7-minimal
Fixed versions: 2.7.17-1~18.04ubuntu1.11+tuxcare.els18
Complete source record
{
"id": "0c39d5f93d51f6564437a71085e8f2cdbf34f6906b60a8a51dd1cba3fa15cea9",
"url": "https://osv.dev/vulnerability/CLSA-2026-1789748541",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-9669",
"summary": "* SECURITY UPDATE: out-of-bounds write via bz2 stream reuse after a decompression error (CVE-2026-9669) - debian/patches/CVE-2026-9669.patch: record the libbz2 error code on the BZ2Decompressor and BZ2File objects in Modules/bz2module.c and refuse every later decompress() or read() call, so BZ2_bzDecompress() is never re-entered on a stream libbz2 has already reported an error for; adds regression tests for both paths to Lib/test/test_bz2.py - CVE-2026-9669",
"evidence": "osv:CLSA-2026-1789748541",
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"severity": "unknown",
"structured": {
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"aliases": [
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"database_specific": {
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},
"database_specific": {
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"purl": "pkg:deb/tuxcare/libpython2.7-stdlib?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
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"database_specific": {
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"purl": "pkg:deb/tuxcare/python2.7?distro=ubuntu-18.04",
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],
"modified": "2026-10-26T09:32:04.272313992Z",
"provider": "osv",
"upstream": [
"CVE-2026-9669"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1789748541.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-9669"
]
},
"related_cves": [
{
"value": "CVE-2026-9669",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449591,
"published_at": "2026-09-18T16:22:32+00:00"
}