CVE-2026-98408
kernel: watchdog: rzv2h: Avoid division by zero
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 14, 2026
Updated · October 16, 2026
Description
A flaw was found in the Linux kernel's Renesas RZ/V2H watchdog timer driver. The driver fails to validate that the clock rate is non-zero during device initialization, leading to a division by zero condition. Under specific hardware or configuration states where the clock rate is zero, this issue can trigger a kernel panic, resulting in a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-369 · Divide By Zero