high7.5
CVE-2026-41681
rust-openssl: rustMdCtxRef::digest_final() writes past caller buffer with no length check
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | openssl | >= 0.10.39, < 0.10.78 | 0.10.78 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Rust-Openssl Project | Rust-Openssl | from 0.10.39 before 0.10.78 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-ghm9-cr32-g9qj
- 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
- https://nvd.nist.gov/vuln/detail/CVE-2026-41681