Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
rustls-ffi versions 0.12.0 through 0.15.6 are vulnerable. In these versions, the client connection constructors rustls_client_connection_new() and rustls_client_connection_new_alpn() keep a reference to the caller's server_name buffer instead of copying it. If the caller frees or reuses that buffer after the call returns, later TLS processing can read freed memory. Upgrade to version 0.15.7 or later, which copies the input buffer. Until then, keep the server_name buffer alive for the lifetime of the rustls_client_config.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
No source has published a CVSS score for this record yet.
- CISA KEV Not listed.
- EPSS No score.
Timeline
- 31 Oct 2026, 14:24 UTC First seen by agentprime
- 31 Oct 2026, 14:24 UTC Confirmed by OSV