Out-of-bounds write in rust-openssl - CVE-2026-45784
Published: May 18, 2026
Vulnerability identifier: #VU131748
CSH Severity: Medium
CVSS v4.0: 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: CVE-2026-45784
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Steven Fackler
Affected software:
rust-openssl
rust-openssl
Detailed vulnerability description
The vulnerability allows a remote attacker to cause heap corruption.
The vulnerability exists due to out-of-bounds write in CipherCtxRef::cipher_update_inplace when processing non-multiple-of-8 input with AES-KW-PAD ciphers. A remote attacker can provide attacker-influenced plaintext lengths to cause heap corruption.
Only users of AES key-wrap-with-padding ciphers are affected.
How to mitigate CVE-2026-45784
Install security update from vendor's website.