UnratedFix available
Fix CVE(s): CVE-2026-19445, CVE-2026-4786
Type: advisorySources: OSV
* SECURITY UPDATE: use-after-free in server-side SSL SNI callbacks - debian/patches/CVE-2026-19445.patch: stop using a borrowed SSLContext callback argument, retain the current context and callback during SNI dispatch, and unregister the callback before context teardown; add regression tests for callback exceptions and TLS 1.3 HelloRetryRequest redispatch - CVE-2026-19445
- 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
- 2.7.18-1~20.04.7+tuxcare.els8
- CVEs
- CVE-2026-19445, CVE-2026-4786
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:44 UTC · Revision 1
Source evidence
* SECURITY UPDATE: use-after-free in server-side SSL SNI callbacks - debian/patches/CVE-2026-19445.patch: stop using a borrowed SSLContext callback argument, retain the current context and callback during SNI dispatch, and unregister the callback before context teardown; add regression tests for callback exceptions and TLS 1.3 HelloRetryRequest redispatch - CVE-2026-19445
osv:CLSA-2026-1791569661
idle-python2.7
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
libpython2.7
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
libpython2.7-dev
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
libpython2.7-minimal
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
libpython2.7-stdlib
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
libpython2.7-testsuite
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
python2.7
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
python2.7-dev
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
python2.7-doc
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
python2.7-examples
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
python2.7-minimal
Fixed versions: 2.7.18-1~20.04.7+tuxcare.els8
Complete source record
{
"id": "75a1238a38a2c03e989fd04bb6bebfb8ddf8272654a0bfcbff2cef6dfc68946a",
"url": "https://osv.dev/vulnerability/CLSA-2026-1791569661",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-19445, CVE-2026-4786",
"summary": "* SECURITY UPDATE: use-after-free in server-side SSL SNI callbacks - debian/patches/CVE-2026-19445.patch: stop using a borrowed SSLContext callback argument, retain the current context and callback during SNI dispatch, and unregister the callback before context teardown; add regression tests for callback exceptions and TLS 1.3 HelloRetryRequest redispatch - CVE-2026-19445",
"evidence": "osv:CLSA-2026-1791569661",
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"evidence": "/affected/0/package/name"
},
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"evidence": "/affected/0/ranges"
}
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},
{
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{
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{
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{
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"affected_versions": []
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{
"name": {
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"evidence": "/affected/10/package/name"
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"affected_versions": []
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],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1791569661",
"aliases": [
"CLSA-2026-1791569661"
],
"affected": [
{
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"package": {
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"database_specific": {
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"package": {
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"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
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{
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],
"package": {
"name": "libpython2.7-dev",
"purl": "pkg:deb/tuxcare/libpython2.7-dev?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
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{
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"package": {
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"purl": "pkg:deb/tuxcare/libpython2.7-minimal?distro=ubuntu-20.04",
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},
"database_specific": {
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"package": {
"name": "libpython2.7-stdlib",
"purl": "pkg:deb/tuxcare/libpython2.7-stdlib?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
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"package": {
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"purl": "pkg:deb/tuxcare/libpython2.7-testsuite?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
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"database_specific": {
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"package": {
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"purl": "pkg:deb/tuxcare/python2.7-dev?distro=ubuntu-20.04",
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"package": {
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"purl": "pkg:deb/tuxcare/python2.7-examples?distro=ubuntu-20.04",
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},
"database_specific": {
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{
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"package": {
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"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
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],
"modified": "2026-10-26T09:32:05.627129324Z",
"provider": "osv",
"upstream": [
"CVE-2026-19445",
"CVE-2026-4786"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu20.04els/CLSA-2026-1791569661.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-19445",
"https://nvd.nist.gov/vuln/detail/CVE-2026-4786"
]
},
"related_cves": [
{
"value": "CVE-2026-19445",
"evidence": "/upstream"
},
{
"value": "CVE-2026-4786",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449707,
"published_at": "2026-10-19T00:59:20+00:00"
}