PT-2026-31038 · Openssl+3 · Openssl+3
Daniel Rhea
+8
·
Published
2026-04-07
·
Updated
2026-05-04
·
CVE-2026-28389
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
OpenSSL versions 3.0 through 3.6
Description
Processing a crafted CMS EnvelopedData message with KeyAgreeRecipientInfo can lead to a NULL pointer dereference. This can cause applications that process attacker-controlled CMS data to crash before authentication or cryptographic operations, resulting in a Denial of Service. The issue occurs when the optional parameters field of KeyEncryptionAlgorithmIdentifier is examined without checking for its presence, leading to a NULL pointer dereference if the field is missing. Applications and services calling CMS decrypt() on untrusted input, such as S/MIME processing or CMS-based protocols, are affected.
Recommendations
Update to a version after 3.6. As a temporary workaround, avoid processing untrusted CMS EnvelopedData messages with KeyAgreeRecipientInfo.
Fix
DoS
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Ibm Aix
Linuxmint
Openssl
Ubuntu