Vulnerability · Published May 14, 2026 · Assigned by GitHub_M
CVE-2026-44662rust-openssl: Heap buffer overflow when encrypting with AES key-wrap-with-padding
Medium 5.1
In plain English
A medium-severity heap buffer overflow in rust-openssl from rust-openssl. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rust-openssl | no fix listed | DEBIAN-CVE-2026-44662 |
| Debian:13 | rust-openssl | no fix listed | DEBIAN-CVE-2026-44662 |
| Debian:14 | rust-openssl | 0.10.79-1 | DEBIAN-CVE-2026-44662 |
| Ubuntu:25.10 | rust-openssl | no fix listed | UBUNTU-CVE-2026-44662 |
| Ubuntu:26.04:LTS | rust-openssl | no fix listed | UBUNTU-CVE-2026-44662 |
| Ubuntu:26.10 | rust-openssl | no fix listed | UBUNTU-CVE-2026-44662 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| rust-openssl | rust-openssl | >= 0.10.0, < 0.10.79 |
Weakness: CWE-122 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N