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CVE-2025-15469 is a data integrity flaw in the OpenSSL command-line tool's 'openssl dgst' handling of one-shot signing algorithms. In OpenSSL 3.5 and 3.6, when 'openssl dgst' is used with algorithms that only support one-shot signing, including Ed25519, Ed448, ML-DSA-44, ML-DSA-65, and ML-DSA-87, the tool buffers input with a 16 MB limit. If the supplied input exceeds that limit, the command silently truncates processing to the first 16 MB and still reports success instead of returning an error. This behavior contradicts expected tool semantics and creates an integrity gap: signatures and verifications performed through the same affected code path may appear valid even though trailing data beyond 16 MB was never authenticated. The issue is limited to the command-line tool behavior and does not affect streaming digest algorithms in 'openssl dgst' or library consumers that process the full message.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
25 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 the 'dgst' tool truncates large inputs, potentially impacting integrity/verification workflows relying on correct hashing of very large data.
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.