GitHub Advisoryadvisory · crates.io

GHSA-phqj-4mhp-q6mq rust-openssl: Potential out-of-bounds write in `CipherCtxRef::cipher_update_inplace` for AES-KW-PAD ciphers

MEDIUM Published 2026-05-19 Modified 2026-05-19 Official page ↗
Aliases
CVE-2026-45784
Ecosystem
crates.io
Packages
openssl
Severity
Moderate
CVSS 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
Weaknesses
CWE-131, CWE-787
Reviewed
2026-05-19

Affected packages

• crates.io openssl: >= 0.10.50, < 0.10.80 → fixed in 0.10.80

Description

`CipherCtxRef::cipher_update_inplace` 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 method was missed in the fix for GHSA-xv59-967r-8726

Related

Alias · CVE (1)

  • CVE-2026-45784 rust-openssl provides OpenSSL bindings for the Rust programming language. vulnerability

Weakness · CWE (2)

  • CWE-131 Incorrect Calculation of Buffer Size weakness
  • CWE-787 Out-of-bounds Write weakness

References