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CVE-2025-69418 is a flaw in OpenSSL's low-level OCB implementation affecting hardware-accelerated code paths such as AES-NI when applications directly invoke CRYPTO_ocb128_encrypt() or CRYPTO_ocb128_decrypt() with input lengths that are not multiples of 16 bytes in a single call. In the vulnerable stream path, full 16-byte blocks are processed but the input and output pointers are not advanced correctly before tail handling. As a result, the subsequent partial-block logic reprocesses the beginning of the buffer instead of the actual trailing bytes. This leaves the final 1 to 15 bytes of the message unencrypted during encryption and excludes those true trailing bytes from the OCB authentication checksum and tag coverage. The issue affects OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, and 1.1.1, while OpenSSL 1.0.2 is not affected. Typical consumers using the EVP or provider-based OCB interfaces are generally not affected because those higher-level implementations split full blocks and partial tails into separate calls and avoid the vulnerable path. TLS is also not affected because it does not use OCB cipher suites in this context.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
33 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in OpenSSL addressed indirectly through upgraded third-party components in Tenable Security Center.
An OpenSSL vulnerability patched by upgrading to OpenSSL 3.6.1 in IPFire Core Update 200.
Unknown (listed among related OpenSSL CVEs, but not described in the content).
Low-severity OpenSSL issue where OCB mode may leave tail bytes unencrypted, potentially impacting confidentiality/integrity for specific OCB usage patterns.
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.