CVE-2026-44662 rust-openssl: Heap buffer overflow when encrypting with AES key-wrap-with-padding
Heap buffer overflow in rust-openssl allows attacker-controlled corruption when using AES key-wrap-with-padding, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-44662?
CVE-2026-44662 is a medium-severity memory corruption vulnerability in rust-openssl, published on 14 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.0 to before 0.10.79, CipherCtxRef::cipher_update, CipherCtxRef::cipher_update_vec, and symm::Crypter::update incorrectly sized output buffers when used with AES key-wrap-with-padding ciphers (EVP_aes_{128,192,256}_wrap_pad). For a non-multiple-of-8 input, OpenSSL writes up to 7 bytes past the end of the caller's buffer or Vec, producing attacker-controllable heap corruption when the plaintext length is attacker-influenced. This only impacts users using AES key-wrap-with-padding ciphers. This vulnerability is fixed in 0.10.79.
Weakness: CWE-122
Which versions are affected by CVE-2026-44662?
2 open source packages ship an affected version, including openssl.
| Package | Affected | Fixed in |
|---|---|---|
openssl crates.io | From 0.10.0 | 0.10.79 |
openssl crates.io | From 0.10.0 | 0.10.79 |
How do I fix CVE-2026-44662?
Upgrade openssl to 0.10.79 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-44662 being exploited?
There is no known exploitation of CVE-2026-44662 in the wild and no public exploit code.
Sources
Also known as AZL-86814, DEBIAN-CVE-2026-44662, GHSA-xv59-967r-8726, MINI-4r32-rqmm-pmq9, MINI-63mx-9wpq-j56f, MINI-f736-9qrg-gr68 and 7 more.