5.9

CVE-2026-42767

NULL Pointer Dereference in CRMF EncryptedValue Decryption

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
OpenSSL ≫ OpenSSL Version >= 3.0.0 < 3.0.21
OpenSSL ≫ OpenSSL Version >= 3.4.0 < 3.4.6
OpenSSL ≫ OpenSSL Version >= 3.5.0 < 3.5.7
OpenSSL ≫ OpenSSL Version >= 3.6.0 < 3.6.3
OpenSSL ≫ OpenSSL Version4.0.0 Update-
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.35% 0.266
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 5.9 2.2 3.6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://openssl-library.org/news/secadv/20260609.txt
Vendor Advisory
https://github.com/openssl/openssl/commit/61a86a8cd73546c9fea916f3d304c1293e05c046
Patch
https://github.com/openssl/openssl/commit/665d5254083affde9982efca7c41dd01cacc8774
Patch
https://github.com/openssl/openssl/commit/810b722f772652ad48042bcc7ab07e3414b11d0f
Patch
https://github.com/openssl/openssl/commit/b90ff3b1bd33b1c18e6a09936d097c2eddef8873
Patch
https://github.com/openssl/openssl/commit/e6f912907fc2ec82a0fd07aae55172c5e5e3d90d
Patch