SB2026081567 - Uncontrolled Recursion in Linux kernel sched

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Main Vulnerability Database SB2026081567

SB2026081567 - Uncontrolled Recursion in Linux kernel sched

Published: August 15, 2026

Security Bulletin ID SB2026081567
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) Uncontrolled Recursion (CVE-ID: CVE-2026-74382)

CWE-ID: CWE-674 - Uncontrolled Recursion

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 uncontrolled recursion in cls_bpf_offload_cmd() in the cls_bpf traffic control offload path when processing a filter replace operation and attempting rollback after repeated tc_setup_cb_replace() failures. A local user can trigger repeated rollback failures to cause a denial of service.

The issue can exhaust kernel stack space during rollback handling, and it is not limited to netdevsim.


Remediation

Install update from vendor's website.

References