CVE-2026-41681

critical

Published 2026-04-24 · Modified 2026-05-05

CVSS v3

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2

—

VIR risk

9.8

Description

rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.39 to before 0.10.78, EVP_DigestFinal() always writes EVP_MD_CTX_size(ctx) to the out buffer. If out is smaller than that, MdCtxRef::digest_final() writes past its end, usually corrupting the stack. This is reachable from safe Rust. This vulnerability is fixed in 0.10.78.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-41681

vendor Authored 2026-05-27

Vendor advisory: security-advisories@github.com — https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-ghm9-cr32-g9qj

vendor Authored 2026-05-27

Vendor advisory: security-advisories@github.com — https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78

vendor Authored 2026-05-27

Vendor advisory: security-advisories@github.com — https://github.com/rust-openssl/rust-openssl/commit/826c3888b77add418b394770e2b2e3a72d9f92fe

OS impact

OS	Version	Status	Fixed in
debian	bookworm	affected
debian	bullseye	affected
debian	forky	affected
debian	sid	fixed	`0.10.78-1`
debian	trixie	affected

Package impact

Ecosystem	Package	Vulnerable	Fixed
crates.io	openssl	`>=0.10.39,<0.10.78`	`0.10.78`

Application impact

Vendor	Product	Versions	Fixed
rust-openssl_project	rust-openssl	`{"startIncluding":"0.10.39","endExcluding":"0.10.78"}`	`0.10.78`

References

CWEs

CWE-121

Verify integrity in audit chain (admin only). AS-IS.