CVE-2026-41898: rust-openssl: Unchecked callback length in PSK/cookie trampolines leaks adjacent memory to peer
(updated )
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.
References
- github.com/advisories/GHSA-hppc-g8h3-xhp3
- github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c
- github.com/rust-openssl/rust-openssl/pull/2607
- github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78
- github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3
- nvd.nist.gov/vuln/detail/CVE-2026-41898
Code Behaviors & Features
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