CVE-2026-41681
rust-openssl: MdCtxRef::digest_final() writes past caller buffer with no length check
- State
- Published
- Severity
- 8.1 High
- Published
- Apr 24, 2026
- Updated
- Apr 24, 2026
- Reserved
- Apr 22, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U | GitHub_M |
Weaknesses
- CWE-121 Stack-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
rust-opensslrust-openssl |
|
References
- https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-ghm9-cr32-g9qj
- https://github.com/rust-openssl/rust-openssl/pull/2608
- https://github.com/rust-openssl/rust-openssl/commit/826c3888b77add418b394770e2b2e3a72d9f92fe
- https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.