CVE-2026-41678

Name	CVE-2026-41678
Description	rust-openssl provides OpenSSL bindings for the Rust programming language. From to before 0.10.78, aes::unwrap_key() contains an incorrect assertion: it checks that out.len() + 8 <= in_.len(), but this condition is reversed. The intended invariant is out.len() >= in_.len() - 8, ensuring the output buffer is large enough. Because of the inverted check, the function only accepts buffers at or below the minimum required size and rejects larger ones. If a smaller buffer is provided the function will write past the end of out by in_.len() - 8 - out.len() bytes, causing an out-of-bounds write from a safe public function. 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-8c75-8mhr-p7r9