SB20260720118 - Out-of-bounds read in Linux kernel ipv4

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Main Vulnerability Database SB20260720118

SB20260720118 - Out-of-bounds read in Linux kernel ipv4

Published: July 20, 2026

Security Bulletin ID SB20260720118
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-2026-64114)

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

CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/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 access in the raw_send_hdrinc IPv4 packet handling in the Linux kernel when processing a malformed IP_HDRINCL packet with an IPv4 header length value less than 5. A local user can send a specially crafted packet through a raw socket to cause a denial of service.

Exploitation requires CAP_NET_RAW. Triggering the reproduced crash path also requires a matching xfrm AH policy on the outgoing route, and loopback does not reach the affected path.


Remediation

Install update from vendor's website.

References