CVE intelligence

CVE-2023-7256

Vulnerability intelligence

Published Aug 31, 2024Sources checked Nov 11, 2026

4.4MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2023-7256 and is rated Medium severity with a CVSS score of 4.4. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Aug 12, 2026

Vendor remediation details

CBL-Mariner Releases

Vendor-listed releases

1.10.5-1
1.10.1-4
7.93-3
7.95-2

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2023-7256?

In affected libpcap versions during the setup of a remote packet capture the internal function sock_initaddress() calls getaddrinfo() and possibly freeaddrinfo(), but does not clearly indicate to the caller function whether freeaddrinfo() still remains to be called after the function returns.

This makes it possible in some scenarios that both the function and its caller call freeaddrinfo() for the same allocated memory block. A similar problem was reported in Apple libpcap, to which Apple assigned CVE-2023-40400.

Source: NVD