GitHub Advisoryadvisory · crates.io

GHSA-hppc-g8h3-xhp3 rust-openssl: Unchecked callback length in PSK/cookie trampolines leaks adjacent memory to peer

HIGH Published 2026-04-22 Modified 2026-04-27 Official page ↗
Aliases
CVE-2026-41898
Ecosystem
crates.io
Packages
openssl
Severity
High
CVSS vector
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
Weaknesses
CWE-126, CWE-130
Reviewed
2026-04-22

Affected packages

• crates.io openssl: >= 0.9.24, < 0.10.78 → fixed in 0.10.78

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.

Related

Alias · CVE (1)

  • CVE-2026-41898 rust-openssl provides OpenSSL bindings for the Rust programming language. vulnerability

Weakness · CWE (2)

  • CWE-126 Buffer Over-read weakness
  • CWE-130 Improper Handling of Length Parameter Inconsistency weakness

References