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CVE-2023-5678 is an uncontrolled resource-consumption vulnerability in OpenSSL X9.42 Diffie-Hellman processing. Excessively large X9.42 DH parameters can cause long processing delays during key generation or public-key validation. DH_check_pub_key() does not perform the relevant size checks for large P and Q parameters, while DH_generate_key() checks P but not Q. The issue also affects call paths through DH_check_pub_key_ex(), EVP_PKEY_public_check(), and EVP_PKEY_generate(), as well as the OpenSSL pkey utility when invoked with -pubcheck and the genpkey utility. OpenSSL SSL/TLS and the OpenSSL 3.0 and 3.1 FIPS providers are not affected.
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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.
40 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability referenced by an AlmaLinux 9.2 TuxCare security update; no technical vulnerability description is provided.
A vulnerability addressed by the Huawei EulerOS SA-2026-3825 security update.
A CVE mapped from a Black Duck advisory example and shown with CISA data, indicating KEV catalog inclusion.
A CVE shown as a related vulnerability for a BDSA entry and illustrated as having CISA KEV 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.