CVE-2026-41898

Description

rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.24 to before 0.10.78, the FFI trampolines behind SslContextBuilder::set_psk_client_callback, set_psk_server_callback, set_cookie_generate_cb, and set_stateless_cookie_generate_cb forwarded the user closure's returned usize directly to OpenSSL without checking it against the &mut [u8] that was handed to the closure. This can lead to buffer overflows and other unintended consequences. This vulnerability is fixed in 0.10.78.

References

• https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c
• https://github.com/rust-openssl/rust-openssl/pull/2607
• https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78
• https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3