Vulnerability-Lookup

MSRC_CVE-2026-28390

Vulnerability from csaf_microsoft - Published: 2026-04-02 00:00 - Updated: 2026-04-12 01:02

Summary

Possible NULL Dereference When Processing CMS KeyTransportRecipientInfo

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-28390

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-476 - NULL Pointer Dereference

None Available There is no fix available for this vulnerability as of now

Vendor Fix 3.3.5-5:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade https://learn.microsoft.com/en-us/azure/azure-lin…

References

URL

Category

	https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
	https://support.microsoft.com/lifecycle	external
	https://www.first.org/cvss	external
	https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

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}

CVE-2026-28390 (GCVE-0-2026-28390)

Vulnerability from cvelistv5 – Published: 2026-04-07 22:00 – Updated: 2026-04-10 20:26

Title

Possible NULL Dereference When Processing CMS KeyTransportRecipientInfo

Summary

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.

Severity ?

No CVSS data available.

CWE

CWE-476 - NULL Pointer Dereference

Assigner

openssl

References

URL

Tags

	https://openssl-library.org/news/secadv/20260407.txt	vendor-advisory
	https://github.com/openssl/openssl/commit/01194a8…	patch
	https://github.com/openssl/openssl/commit/2e39b7a…	patch
	https://github.com/openssl/openssl/commit/ea7b4ea…	patch
	https://github.com/openssl/openssl/commit/fd2f1a6…	patch
	https://github.com/openssl/openssl/commit/af2a5fe…	patch

Impacted products

	Vendor	Product	Version
	OpenSSL	OpenSSL	Affected: 3.6.0 , < 3.6.2 (semver) Affected: 3.5.0 , < 3.5.6 (semver) Affected: 3.4.0 , < 3.4.5 (semver) Affected: 3.3.0 , < 3.3.7 (semver) Affected: 3.0.0 , < 3.0.20 (semver) Affected: 1.1.1 , < 1.1.1zg (custom) Affected: 1.0.2 , < 1.0.2zp (custom)

Date Public ?

2026-04-07 14:00

Credits

Muhammad Daffa Zhanpeng Liu (Tencent Xuanwu Lab) Guannan Wang (Tencent Xuanwu Lab) Guancheng Li (Tencent Xuanwu Lab) Joshua Rogers Chanho Kim Neil Horman

Show details on NVD website

JSON

To clipboard

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        {
          "name": "3.6.2 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/01194a8f1941115cd0383bfa91c736dd3993c8bc"
        },
        {
          "name": "3.5.6 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/2e39b7a6993be445fddb9fbce316fa756e0397b6"
        },
        {
          "name": "3.4.5 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/ea7b4ea4f9f853521ba34830cbcadc970d2e0788"
        },
        {
          "name": "3.3.7 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/fd2f1a6cf53b9ceeca723a001aa4b825d7c7ee75"
        },
        {
          "name": "3.0.20 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/af2a5fecd3e71a29e7568f9c1453dec5cebbaff4"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Possible NULL Dereference When Processing CMS KeyTransportRecipientInfo",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2026-28390",
    "datePublished": "2026-04-07T22:00:54.172Z",
    "dateReserved": "2026-02-27T13:45:02.161Z",
    "dateUpdated": "2026-04-10T20:26:06.061Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

MSRC_CVE-2026-28390

CVE-2026-28390 (GCVE-0-2026-28390)

Tags

Sightings

Nomenclature