Improper Validation of Specified Quantity in Input in Linux kernel - CVE-2026-98434
Published: October 22, 2026
Vulnerability identifier: #VU156732
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98434
CWE-ID: CWE-1284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to bypass intended sysctl value limits, potentially disrupting kernel behavior.
The vulnerability exists due to missing numeric range validation in do_proc_int_conv_ms_jiffies_minmax in the Linux kernel when converting sysctl values between milliseconds and jiffies. A local privileged user can supply out-of-range values to a writable sysctl setting handled by this function to bypass its intended limits and potentially disrupt kernel behavior.
Affected software
Linux kernel
How to mitigate CVE-2026-98434
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3