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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0177
Multiple Vulnerabilities in OpenSSL

Original Issue Date:April 09, 2026

Severity Rating: MEDIUM

Software Affected

  • OpenSSL version 3.6.
  • OpenSSL version 3.5.
  • OpenSSL version 3.4.
  • OpenSSL version 3.3.
  • OpenSSL version 3.1.
  • OpenSSL version 3.0.
  • OpenSSL version 1.1.1
  • OpenSSL version 1.0.2

Overview

Multiple vulnerabilities have been reported in OpenSSL which could be exploited by an attacker to cause denial of service, or disclosure of sensitive information on the targeted system.

Target Audience:
All end-user organizations and individuals using OpenSSL.

Risk Assessment:
Risk of denial of service and sensitive information disclosure.

Impact Assessment:
Potential service disruption and unauthorized access to sensitive information.

Description

OpenSSL is a free and open-source software for general-purpose cryptography and secure communication. It provides a robust, full-featured toolkit for implementing the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols.

Multiple vulnerabilities exist in OpenSSL due to incorrect failure handling in RSA KEM RSASVE encapsulation; out-of-bounds read in AES-CFB-128 on X86-64 with AVX-512 support; potential use-after-free in DANE Client Code; NULL pointer dereference when processing a Delta CRL; possible NULL dereference when processing CMS KeyAgreeRecipientInfo; possible NULL dereference when processing CMS KeyTransportRecipientInfo; and heap buffer overflow in hexadecimal conversion. A remote attacker could exploit these vulnerabilities by sending specially crafted inputs.

Successful exploitation of these vulnerabilities could allow an attacker to cause a denial of service condition or disclose sensitive information on the targeted system.

Solution

Apply appropriate updates as mentioned by the vendor:
https://openssl-library.org/news/secadv/20260407.txt

Vendor Information

OpenSSL
https://openssl-library.org/news/vulnerabilities/

References

OpenSSL
https://openssl-library.org/news/secadv/20260407.txt

CVE Name
CVE-2026-31790
CVE-2026-28386
CVE-2026-28387
CVE-2026-28388
CVE-2026-28389
CVE-2026-28390
CVE-2026-31789

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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