7.5

CVE-2026-28390

Possible NULL Dereference When Processing CMS KeyTransportRecipientInfo

Issue summary: During processing of a crafted CMS EnvelopedData message
with KeyTransportRecipientInfo a NULL pointer dereference can happen.

Impact summary: Applications that process attacker-controlled CMS data may
crash before authentication or cryptographic operations occur resulting in
Denial of Service.

When a CMS EnvelopedData message that uses KeyTransportRecipientInfo with
RSA-OAEP encryption is processed, the optional parameters field of
RSA-OAEP SourceFunc algorithm identifier is examined without checking
for its presence. This results in a NULL pointer dereference if the field
is missing.

Applications and services that call CMS_decrypt() on untrusted input
(e.g., S/MIME processing or CMS-based protocols) are vulnerable.

The FIPS modules in 3.6, 3.5, 3.4, 3.3 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 >= 1.0.2 < 1.0.2zp
OpenSSL ≫ OpenSSL Version >= 1.1.1 < 1.1.1zg
OpenSSL ≫ OpenSSL Version >= 3.0.0 < 3.0.20
OpenSSL ≫ OpenSSL Version >= 3.3.0 < 3.3.7
OpenSSL ≫ OpenSSL Version >= 3.4.0 < 3.4.5
OpenSSL ≫ OpenSSL Version >= 3.5.0 < 3.5.6
OpenSSL ≫ OpenSSL Version >= 3.6.0 < 3.6.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.81% 0.519
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/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/20260407.txt
Vendor Advisory
https://github.com/openssl/openssl/commit/01194a8f1941115cd0383bfa91c736dd3993c8bc
Patch
https://github.com/openssl/openssl/commit/2e39b7a6993be445fddb9fbce316fa756e0397b6
Patch
https://github.com/openssl/openssl/commit/af2a5fecd3e71a29e7568f9c1453dec5cebbaff4
Patch
https://github.com/openssl/openssl/commit/ea7b4ea4f9f853521ba34830cbcadc970d2e0788
Patch
https://github.com/openssl/openssl/commit/fd2f1a6cf53b9ceeca723a001aa4b825d7c7ee75
Patch
https://cert-portal.siemens.com/productcert/html/ssa-032379.html
https://cert-portal.siemens.com/productcert/html/ssa-265688.html