SB2026040645 - Use-after-free in Linux kernel ethernet cadence driver

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Main Vulnerability Database SB2026040645

SB2026040645 - Use-after-free in Linux kernel ethernet cadence driver

Published: April 6, 2026

Security Bulletin ID SB2026040645
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) Use-after-free (CVE-ID: CVE-2026-31396)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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/E:U/U:Clear


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

The vulnerability exists due to use-after-free in the macb PTP clock handling code when handling ethtool get_ts_info requests while the network interface is present but the PTP clock has been destroyed. A local user can issue a crafted ioctl request to trigger a use-after-free access and cause a denial of service.

The issue is reachable through the get_ts_info ethtool call and affects the Linux kernel macb network driver PTP clock lifecycle.


Remediation

Install update from vendor's website.

References