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CVE PROGRAM SOURCE RECORD5.9 Medium

CVE-2026-42767

NULL Pointer Dereference in CRMF EncryptedValue Decryption

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Status
Published
Published
Updated
Assigning organization
openssl

Description

Issue summary: An attacker-controlled CMP (Certificate Management Protocol) server could trigger a NULL pointer dereference in a CMP client application. Impact summary: A NULL pointer dereference causes a crash of the application and a Denial of Service. An attacker controlling a CMP server (or acting as a man-in-the-middle) could craft a CMP response containing a CRMF (Certificate Request Message Format) CertRepMessage with an EncryptedValue structure where the symmAlg field has an algorithm OID but no parameters field. When the OpenSSL CMP client processes this response, the NULL dereference occurs, causing a crash of the CMP client. Applications that process untrusted CMP/CRMF messages may be affected. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

OpenSSL OpenSSL

Default version status: unaffected

  • 4.0.0 to < 4.0.1affected
  • 3.6.0 to < 3.6.3affected
  • 3.5.0 to < 3.5.7affected
  • 3.4.0 to < 3.4.6affected
  • 3.0.0 to < 3.0.21affected

References