SB20260919142 - Integer overflow in Linux kernel sched

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260919142

SB20260919142 - Integer overflow in Linux kernel sched

Published: September 19, 2026

Security Bulletin ID SB20260919142
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) Integer overflow (CVE-ID: CVE-2026-90074)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


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

The vulnerability exists due to signed integer overflow in the fq_pie queuing discipline when initializing the default quantum from a device MTU. A local privileged user can configure a device with a huge MTU to cause a denial of service.

Exploitation requires CAP_NET_ADMIN in a user namespace and a device whose MTU plus hard header length causes psched_mtu() to wrap into the sign bit.


Remediation

Install update from vendor's website.

References