Out-of-bounds read in rust-openssl - #VU126497
Published: April 20, 2026
Vulnerability identifier: #VU126497
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-125
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 disclose sensitive information.
The vulnerability exists due to out-of-bounds read in the *_from_pem_callback APIs when processing a user-supplied password callback result. A remote attacker can supply a callback that returns an oversized length to disclose sensitive information.
Only some versions of OpenSSL are affected, and OpenSSL 3.x is not affected.
Remediation
Install security update from vendor's website.