OpenSSL up to 3.6.1 Delta CRL null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in OpenSSL up to 3.6.1. Affected is an unknown function of the component Delta CRL Handler. Such manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2026-28388. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in OpenSSL up to 3.6.1. It has been rated as problematic. Affected by this issue is an unknown part of the component Delta CRL Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability.

The weakness was shared by Igor Morgenstern. The advisory is shared for download at openssl-library.org. This vulnerability is handled as CVE-2026-28388. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/20/2026).

The vulnerability scanner Nessus provides a plugin with the ID 305682 (SUSE SLES15 Security Update : openssl-3 (SUSE-SU-2026:1213-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.0.2zp, 1.1.1zg, 3.0.20, 3.3.7, 3.4.5, 3.5.6 or 3.6.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (305682), EUVD (EUVD-2026-19962) and CERT Bund (WID-SEC-2026-0995). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • IBM AIX
  • IBM VIOS
  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Red Hat Ansible Automation Platform
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • NetApp AFF
  • SUSE openSUSE
  • RESF Rocky Linux
  • IBM MQ
  • NetApp FAS
  • Microsoft Azure Linux
  • Open Source OpenSSL
  • NCP Secure Enterprise VPN Server

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 305682
Nessus Name: SUSE SLES15 Security Update : openssl-3 (SUSE-SU-2026:1213-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenSSL 1.0.2zp/1.1.1zg/3.0.20/3.3.7/3.4.5/3.5.6/3.6.2

Timelineinfo

04/07/2026 Advisory disclosed
04/07/2026 +0 days VulDB entry created
06/20/2026 +74 days VulDB entry last update

Sourcesinfo

Product: openssl.org

Advisory: openssl-library.org
Researcher: Igor Morgenstern
Status: Confirmed

CVE: CVE-2026-28388 (🔒)
GCVE (CVE): GCVE-0-2026-28388
GCVE (VulDB): GCVE-100-355904
EUVD: 🔒
CERT Bund: WID-SEC-2026-0995 - OpenSSL: Mehrere Schwachstellen

Entryinfo

Created: 04/07/2026 21:14
Updated: 06/20/2026 04:23
Changes: 04/07/2026 21:14 (53), 04/08/2026 02:32 (1), 04/09/2026 15:56 (2), 05/02/2026 03:06 (7), 06/10/2026 05:32 (1), 06/20/2026 04:23 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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