SB20260919119 - Resource exhaustion in Linux kernel sched

Description

This security bulletin contains information about 1 vulnerability.

1) Resource exhaustion (CVE-ID: CVE-2026-90099)

CWE-ID: CWE-400 - Resource exhaustion

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 improper memory resource accounting in traffic-control classifier allocation paths when creating traffic-control filters. A local user can create a large number of traffic-control filters to cause a denial of service.

The issue requires network scheduling, a supported classifier, classifier actions, memory control groups, user namespaces, and network namespaces to be enabled.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/18c68c8f3d3ff0a4def1391021b439c4333a6c71
• https://git.kernel.org/stable/c/1beb81947eb486716af80db7a584f9e9fef7e003