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CVE-2026-42767 is a NULL pointer dereference vulnerability in OpenSSL's CMP client handling of CRMF EncryptedValue data during processing of a CMP CertRepMessage. A malicious CMP server, or an attacker positioned as a man-in-the-middle, can send a crafted CMP response containing a CRMF EncryptedValue structure whose symmAlg field includes an algorithm OID but omits the required parameters field. When a vulnerable OpenSSL-based CMP client processes this malformed response, it dereferences a NULL pointer and crashes. The issue affects applications that process untrusted CMP/CRMF messages through vulnerable OpenSSL versions. The vulnerable code is outside the OpenSSL FIPS module boundary, and the FIPS modules in the referenced OpenSSL branches are not affected.
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No public exploits tracked yet. Mallory keeps watching.
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.
22 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An OpenSSL vulnerability addressed in Alpine Linux 3.22.5 and 3.23.5 as part of the June 9, 2026 OpenSSL advisory.
An OpenSSL vulnerability addressed in Alpine Linux 3.24.1 as part of the June 9, 2026 advisory.
A low-severity OpenSSL CMP/CRMF processing flaw where crafted EncryptedValue structures can trigger a NULL pointer dereference in CMP clients, causing denial of service.
A security vulnerability in OpenSSL fixed by updating OpenSSL to version 3.5.7; no further details are provided in the content.
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.