Source: pypy3 X-Debbugs-CC: [email protected] Severity: important Tags: security
Hi, The following vulnerability was published for pypy3. CVE-2026-19445[0]: | 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. Fix in cpython: https://github.com/python/cpython/issues/156293 https://github.com/python/cpython/pull/158504 https://github.com/python/cpython/pull/158523 (3.11) If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-19445 https://www.cve.org/CVERecord?id=CVE-2026-19445 Please adjust the affected versions in the BTS as needed.
