SB2026102204 - Improper Validation of Specified Quantity in Input in Linux kernel time

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Validation of Specified Quantity in Input (CVE-ID: CVE-2026-98434)

CWE-ID: CWE-1284 - Improper Validation of Specified Quantity in Input

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1c23dba51dbf7e86c7c2e617c964be1411329cb4
• https://git.kernel.org/stable/c/82431877d837a6c2593efd8e66ba28b35a220ca4