HIGH

GHSA-hppc-g8h3-xhp3

rust-openssl: Unchecked callback length in PSK/cookie trampolines leaks adjacent memory to peer

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

crates.io/openssl

Introduced in: 0.9.24Fixed in: 0.10.78

Upgrade openssl to 0.10.78 or newer (ecosystem crates.io).

References

https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3[WEB]
https://nvd.nist.gov/vuln/detail/CVE-2026-41898[ADVISORY]
https://github.com/rust-openssl/rust-openssl/pull/2607[WEB]
https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c[WEB]
https://github.com/rust-openssl/rust-openssl[PACKAGE]
https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78[WEB]