CVE-2026-41676
rust-openssl: Deriver::derive and PkeyCtxRef::derive can overflow short buffers on OpenSSL 1.1.1
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.27 to before 0.10.78, Deriver::derive (and PkeyCtxRef::derive) sets len = buf.len() and passes it as the in/out length to EVP_PKEY_derive, relying on OpenSSL to honor it. On OpenSSL 1.1.x, X25519, X448, DH and HKDF-extract ignore the incoming *keylen, unconditionally writing the full shared secret (32/56/prime-size bytes). A caller passing a short slice gets a heap/stack overflow from safe code. OpenSSL 3.x providers do check, so this only impacts older OpenSSL. This vulnerability is fixed in 0.10.78.
| CWE | CWE-787 CWE-131 |
| Vendor | rust-openssl |
| Product | rust-openssl |
| Published | Apr 24, 2026 |
| Last Updated | Apr 24, 2026 |
Stay Ahead of the Next One
Get instant alerts for rust-openssl rust-openssl
Be the first to know when new unknown vulnerabilities affecting rust-openssl rust-openssl are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
rust-openssl / rust-openssl
>= 0.9.27, < 0.10.78