rust-openssl/rust-openssl · Security
rust-openssl: Unchecked callback length in PSK/cookie trampolines leaks adjacent memory to peer
- GHSA ID
- GHSA-hppc-g8h3-xhp3
- CVE ID
- CVE-2026-41898
- Severity
- high
- Published
- Updated
- CVSS v4
- 8.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N
Description
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.
CWEs
- CWE-126 · Buffer Over-read
- CWE-130 · Improper Handling of Length Parameter Inconsistency
References
- 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 ↗
- https://github.com/advisories/GHSA-hppc-g8h3-xhp3 ↗