Improper input validation in Linux kernel - CVE-2026-98012
Published: September 28, 2026
Vulnerability identifier: #VU152463
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-2026-98012
CWE-ID: CWE-20
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 input validation in the SFQ qdisc change path when processing crafted qdisc configuration. A local user can configure a quantum value of 1 with a crafted size table to cause a denial of service.
The SFQ scheduler must be enabled, and exploitation requires CAP_NET_ADMIN, which can be namespace-local.
Affected software
Linux kernel
How to mitigate CVE-2026-98012
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3