CVE-2026-41898

Name	CVE-2026-41898
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1134881

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rust-openssl (PTS)	bullseye	0.10.29-1	vulnerable
	bullseye (security)	0.10.29-1+deb11u1	vulnerable
	bookworm	0.10.45-1	vulnerable
	trixie	0.10.72-1	vulnerable
	forky	0.10.73-1	vulnerable
	sid	0.10.78-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rust-openssl	source	(unstable)	0.10.78-1			1134881

Notes

[trixie] - rust-openssl <no-dsa> (Minor issue)
[bookworm] - rust-openssl <no-dsa> (Minor issue)
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 (openssl-v0.10.78)