ALPINE-CVE-2026-19445
- Source
- https://security.alpinelinux.org/vuln/CVE-2026-19445
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-19445.json
- JSON Data
- https://api.osv.dev/v1/vulns/ALPINE-CVE-2026-19445
- Upstream
- Published
- 2026-09-30T17:16:45Z
- Modified
- 2026-10-01T15:30:03Z
- Severity
-
- 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- [none]
- Details
-
A remote, unauthenticated TLS client can make a server crash or call through a freed pointer if its sni_callback assigns a different context to SSLSocket.context (the documented way to select a certificate per server name) and nothing else keeps the original ssl.SSLContext alive. Typical cases are servers that create an SSLContext per connection or replace it while connections are open; servers that wrap their listening socket with it are not affected.
Mitigation: keep a reference to every SSLContext that sets sni_callback for the lifetime of the server. TLS clients are not affected.
- References
Affected packages
Alpine:v3.21 / python3
Package
- Name
- python3
- Purl
- pkg:apk/alpine/python3?arch=source
Alpine:v3.22 / python3
Package
- Name
- python3
- Purl
- pkg:apk/alpine/python3?arch=source
Alpine:v3.23 / python3
Package
- Name
- python3
- Purl
- pkg:apk/alpine/python3?arch=source