OpenSSL RFC 3211 KEK Unwrap Out-of-Bounds Read/Write
CVE-2025-9230 is an OpenSSL memory-safety vulnerability in RFC 3211 KEK Unwrap processing. According to the provided content, an application attempting to decrypt Cryptographic Message Syntax (CMS) messages encrypted using password-based encryption (PWRI) can trigger both an out-of-bounds read and an out-of-bounds write. The issue is described in OpenSSL advisories and release notes as affecting RFC 3211 KEK Unwrap handling during CMS decryption. The vulnerable condition occurs when processing specially crafted CMS content using password-based encryption support, a feature noted as rarely used. OpenSSL states that the FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1, and 3.0 are not affected because the CMS implementation is outside the OpenSSL FIPS module boundary.
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Exploits
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Recent activity
66 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Denial-of-service condition associated with an outdated OpenSSL version used by SAP NetWeaver AS Java Adobe Document Services component.
An out-of-bounds read and write vulnerability in RFC 3211 KEK Unwrap handling in OpenSSL.
An out-of-bounds read and write issue in RFC 3211 KEK Unwrap in OpenSSL.
An out-of-bounds read and write issue in RFC 3211 KEK Unwrap in OpenSSL, fixed in the 3.5.4 security patch release.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.