SB20261015112 - Division by zero in Linux kernel watchdog driver
Published: October 15, 2026
Security Bulletin ID
SB20261015112
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Division by zero (CVE-ID: CVE-2026-98409)
CWE-ID: CWE-369 - Divide By Zero
CVSSv4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to division by zero in the rtd119x watchdog driver's rtd119x_wdt_probe() function when initializing the watchdog device with a clock rate of zero. A local user can trigger the affected initialization path to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1f22001b34984350844d629862f70934770cb796
- https://git.kernel.org/stable/c/5af7d2cbd20f893def03c8310a460ade66a5d822
- https://git.kernel.org/stable/c/757c721545b9ffac5c3042a0cd3685ea28af7e81
- https://git.kernel.org/stable/c/8a12e049d517d7dee78500633f8f0e47262a67e0
- https://git.kernel.org/stable/c/b4ede87765a2e58ca4f18f5f8037c4826b9cc93f