CVE-2026-42764

Published: Giu 09, 2026 Last Modified: Giu 15, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,5
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high

Description

AI Translation Available

Issue summary: Receiving a QUIC initial packet with an invalid token may
trigger a NULL pointer dereference in the OpenSSL QUIC server with
address validation disabled.

Impact summary: NULL pointer dereference typically causes abnormal termination
of the affected QUIC server process and a Denial of Service.

If the address validation is disabled in the OpenSSL QUIC server
implementation, an attacker can crash the server by sending an initial
packet with an invalid or expired token.

By default, the client address validation is enabled in the OpenSSL QUIC server
implementation, which makes the default configuration not vulnerable
to this issue. However if the SSL_LISTENER_FLAG_NO_VALIDATE is used with
the SSL_new_listener() call, the address validation is disabled making the
vulnerable code reachable.

The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this
issue, as the affected code is outside the OpenSSL FIPS module boundary.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0004
Percentile
0,1th
Updated

EPSS Score Trend (Last 7 Days)

476

NULL Pointer Dereference

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality
Potential Impacts:
Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands Read Memory Modify Memory
Applicable Platforms
Languages: C, C++, Java, C#, Go
Likelihood of Exploit: Medium
View CWE Details
Application

Openssl by Openssl

Product Information
Vendor Openssl
Product Openssl
Version Range Affected
From 3.5.0 (inclusive)
To 3.5.7 (exclusive)
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Openssl by Openssl

Product Information
Vendor Openssl
Product Openssl
Version 4.0.0
cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Openssl by Openssl

Product Information
Vendor Openssl
Product Openssl
Version Range Affected
From 3.6.0 (inclusive)
To 3.6.3 (exclusive)
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/openssl/openssl/commit/5e3ed291b8af0b03d…
https://github.com/openssl/openssl/commit/5e3ed291b8af0b03d5d3b9e56a1da69a187e9…
https://github.com/openssl/openssl/commit/a45a0aba8095682c8…
https://github.com/openssl/openssl/commit/a45a0aba8095682c88ff4fc4a784892b8c6f0…
https://github.com/openssl/openssl/commit/bf29a458c1a231eca…
https://github.com/openssl/openssl/commit/bf29a458c1a231eca87e384c62b9c2553fa57…
https://openssl-library.org/news/secadv/20260609.txt
https://openssl-library.org/news/secadv/20260609.txt