high8.3
CVE-2026-41898
rust-openssl: Unchecked callback length in PSK/cookie trampolines leaks adjacent memory to peer
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | openssl | >= 0.9.24, < 0.10.78 | 0.10.78 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Rust-Openssl Project | Rust-Openssl | from 0.9.24 before 0.10.78 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-hppc-g8h3-xhp3
- https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3
- https://github.com/rust-openssl/rust-openssl/pull/2607
- https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c
- https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78
- https://nvd.nist.gov/vuln/detail/CVE-2026-41898