Heap-based buffer overflow in rust-openssl - #VU129723
Published: May 5, 2026
Vulnerability identifier: #VU129723
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
rust-openssl
rust-openssl
Software vendor:
Steven Fackler
Steven Fackler
Description
The vulnerability allows a remote attacker to cause heap corruption.
The vulnerability exists due to a heap-based buffer overflow in CipherCtxRef::cipher_update, CipherCtxRef::cipher_update_vec, and symm::Crypter::update when encrypting non-multiple-of-8 input with AES key-wrap-with-padding ciphers. A remote attacker can supply attacker-influenced plaintext length to cause heap corruption.
This only impacts applications using AES key-wrap-with-padding ciphers.
Remediation
Install security update from vendor's website.