Resource exhaustion in Linux kernel - CVE-2026-90099
Published: September 19, 2026
Vulnerability identifier: #VU151387
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-90099
CWE-ID: CWE-400
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-90099
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3