SB2026082472 - Out-of-bounds read in Linux kernel openvswitch

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Main Vulnerability Database SB2026082472

SB2026082472 - Out-of-bounds read in Linux kernel openvswitch

Published: August 24, 2026

Security Bulletin ID SB2026082472
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-74701)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in key_extract() in the Open vSwitch flow extraction logic when processing a packet on an ARPHRD_NONE device with a user-controlled protocol field indicating Ethernet. A local user can send a specially crafted packet with an insufficient linear header to cause a denial of service.

The issue is triggered when the packet is received from devices such as TUN.


Remediation

Install update from vendor's website.

References