CVE intelligence

CVE-2026-0799

Vulnerability intelligence

Published Sep 5, 2026Sources checked Oct 28, 2026

8.7HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-0799 and is rated High severity with a CVSS score of 8.7. 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: Sep 15, 2026

See the Microsoft Security Update Guide for the update that applies to your product.

Vendor-listed releases

1.10.7-1

CISA KEVNot listedBased on the latest collected catalog

EPSS0.1%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-0799?

In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value.

In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.

Source: NVD