SB20260720108 - Out-of-bounds read in Linux kernel net driver

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Main Vulnerability Database SB20260720108

SB20260720108 - Out-of-bounds read in Linux kernel net driver

Published: July 20, 2026

Security Bulletin ID SB20260720108
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

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-2026-64121)

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

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in ifb_get_ethtool_stats in the IFB network driver when handling ethtool statistics requests on a device with more RX queues than TX queues. A local user can request ethtool statistics for a crafted asymmetric IFB device to disclose sensitive information.

Exploitation requires an IFB device configuration where the RX queue count exceeds the TX queue count.


Remediation

Install update from vendor's website.

References