UnratedFix available
Fix CVE(s): CVE-2026-9669
Type: advisorySources: OSV
* SECURITY UPDATE: out-of-bounds stack write when a bz2 decompressor or BZ2File handle is reused after a decompression error - debian/patches/CVE-2026-9669.patch: record the bzlib error code on BZ2DecompObject and refuse further decompress() calls with ValueError in Modules/bz2module.c, so that crafted input can no longer make BZ2_bzDecompress() resume from an invalid internal state; also make the error sticky for the C BZ2File read paths, which re-entered the errored stream in the same way, and add regression tests for both - 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
- 2.7.16-2+deb10u4+tuxcare.els5
- CVEs
- CVE-2026-9669
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:24 UTC · Revision 1
Source evidence
* SECURITY UPDATE: out-of-bounds stack write when a bz2 decompressor or BZ2File handle is reused after a decompression error - debian/patches/CVE-2026-9669.patch: record the bzlib error code on BZ2DecompObject and refuse further decompress() calls with ValueError in Modules/bz2module.c, so that crafted input can no longer make BZ2_bzDecompress() resume from an invalid internal state; also make the error sticky for the C BZ2File read paths, which re-entered the errored stream in the same way, and add regression tests for both - CVE-2026-9669
osv:CLSA-2026-1789461197
idle-python2.7
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
libpython2.7
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
libpython2.7-dev
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
libpython2.7-minimal
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
libpython2.7-stdlib
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
libpython2.7-testsuite
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
python2.7
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
python2.7-dev
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
python2.7-doc
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
python2.7-examples
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
python2.7-minimal
Fixed versions: 2.7.16-2+deb10u4+tuxcare.els5
Complete source record
{
"id": "6e40c930a1b6950960b8cb277322b641bf55b31177e3823b40c7c83fa06a3795",
"url": "https://osv.dev/vulnerability/CLSA-2026-1789461197",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-9669",
"summary": "* SECURITY UPDATE: out-of-bounds stack write when a bz2 decompressor or BZ2File handle is reused after a decompression error - debian/patches/CVE-2026-9669.patch: record the bzlib error code on BZ2DecompObject and refuse further decompress() calls with ValueError in Modules/bz2module.c, so that crafted input can no longer make BZ2_bzDecompress() resume from an invalid internal state; also make the error sticky for the C BZ2File read paths, which re-entered the errored stream in the same way, and add regression tests for both - CVE-2026-9669",
"evidence": "osv:CLSA-2026-1789461197",
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{
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{
"name": {
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"evidence": "/affected/10/package/name"
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],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1789461197",
"aliases": [
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"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
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"package": {
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"purl": "pkg:deb/tuxcare/libpython2.7-dev?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
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{
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"purl": "pkg:deb/tuxcare/libpython2.7-minimal?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
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"database_specific": {
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{
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"package": {
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"purl": "pkg:deb/tuxcare/libpython2.7-stdlib?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
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"database_specific": {
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"package": {
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"purl": "pkg:deb/tuxcare/libpython2.7-testsuite?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
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"purl": "pkg:deb/tuxcare/python2.7-dev?distro=debian-10",
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],
"modified": "2026-10-26T09:31:53.682147018Z",
"provider": "osv",
"upstream": [
"CVE-2026-9669"
],
"references": [
"https://errata.tuxcare.com/els_os/debian10els/CLSA-2026-1789461197.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": 448868,
"published_at": "2026-09-15T08:33:28+00:00"
}