AZL-105690
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105690.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-105690
- Upstream
- Published
- 2026-09-30T17:16:45Z
- Modified
- 2026-10-04T05:34:07Z
- Summary
- CVE-2026-19445 affecting package python3 3.12.14-2
- 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