CVE-2026-41898

CRITICAL9.8EPSS 0.06%

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

Published: 4/22/2026Modified: 5/6/2026
Also known as:GHSA-hppc-g8h3-xhp3CGA-c9p9-wwqf-q99fDEBIAN-CVE-2026-41898

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.

Affected packages (2)

CVSS scores

SourceVersionSeverityVector
osvCVSS 4.0—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
osvCVSS 3.1CRITICAL9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (7)