rust-openssl: Unchecked callback length in PSK/cookie trampolines leaks adjacent memory to peer
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-41898US | medium5.3 | — | ||
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… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/rust-openssl/rust-opensslPACKAGE
- https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24cWEB
- https://github.com/rust-openssl/rust-openssl/pull/2607WEB
- https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78WEB
- https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-41898ADVISORY
scry
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