CLSA-2026-1791820487

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Import Source
https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json
JSON Data
https://api.osv.dev/v1/vulns/CLSA-2026-1791820487
Upstream
CVE (2)
Published
2026-10-19T20:55:08Z
Modified
2026-10-26T09:32:04Z
Summary
Fix CVE(s): CVE-2026-19445, CVE-2026-4786
Details
  • SECURITY UPDATE: use-after-free in the ssl module when a servername callback switches the connection to another SSLContext
    • debian/patches/CVE-2026-19445.patch: look the SSLContext up from the SSL object instead of the borrowed servername-callback argument and hold references to it and to the callback while they are used, and unregister the callback when the context is deallocated, in Modules/_ssl.c, so a TLS client can no longer make the server call through a freed SSLContext; adds the upstream regression tests to Lib/test/test_ssl.py.
    • CVE-2026-19445
References

Affected packages

TuxCare:Ubuntu:18.04
idle-python3.6

Package

Name
idle-python3.6
Purl
pkg:deb/tuxcare/idle-python3.6?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
libpython3.6

Package

Name
libpython3.6
Purl
pkg:deb/tuxcare/libpython3.6?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
libpython3.6-dev

Package

Name
libpython3.6-dev
Purl
pkg:deb/tuxcare/libpython3.6-dev?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
libpython3.6-minimal

Package

Name
libpython3.6-minimal
Purl
pkg:deb/tuxcare/libpython3.6-minimal?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
libpython3.6-stdlib

Package

Name
libpython3.6-stdlib
Purl
pkg:deb/tuxcare/libpython3.6-stdlib?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
libpython3.6-testsuite

Package

Name
libpython3.6-testsuite
Purl
pkg:deb/tuxcare/libpython3.6-testsuite?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
python3.6

Package

Name
python3.6
Purl
pkg:deb/tuxcare/python3.6?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
python3.6-dev

Package

Name
python3.6-dev
Purl
pkg:deb/tuxcare/python3.6-dev?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
python3.6-doc

Package

Name
python3.6-doc
Purl
pkg:deb/tuxcare/python3.6-doc?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
python3.6-examples

Package

Name
python3.6-examples
Purl
pkg:deb/tuxcare/python3.6-examples?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
python3.6-minimal

Package

Name
python3.6-minimal
Purl
pkg:deb/tuxcare/python3.6-minimal?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"
python3.6-venv

Package

Name
python3.6-venv
Purl
pkg:deb/tuxcare/python3.6-venv?distro=ubuntu-18.04

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.9-1~18.04ubuntu1.12+tuxcare.els27

Database specific

source 
"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791820487.json"