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Vulnerability · CVE-2026-98409

CVE-2026-98409: watchdog: rtd119x: Avoid division by zero

Published Oct 14, 2026 · Linux Linux Kernel · evidence confidence high

From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: watchdog: rtd119x: Avoid division by zero clk_get_rate() could return 0. Avoid a division by zero panic. The Linux kernel CVE team has assigned CVE-2026-98409 to this issue. Affected and fixed versions =========================== Issue introduced in 4.16 with commit 2bdf6acbfead7e9aa69f36ee5682d1e5c8f70367 and fixed in 6.6.158 with commit 757c721545b9ffac5c3042a0cd3685ea28af7e81 Issue introduced in 4.16 with commit 2bdf6acbfead7e9aa69f36ee5682d1e5c8f70367 and

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2026-98409 is a medium public vulnerability record for Linux Linux Kernel. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether Linux Linux Kernel is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: kernel. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: EPSS 0.2%. It is not currently listed in the CISA Known Exploited catalog. Sources contributing to this record: cve_org, epss, linux_kernel, tenable. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.

  • Patch and remediation

    No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2026 · Tenable CVE Database

    Detected

    In the Linux kernel, the following vulnerability has been resolved: watchdog: rtd119x: Avoid division by zero clk_get_rate() could return 0. Avoid a division by zero panic.

Affected

  • linux kernelversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-98409

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-98409

    30-day exploitation probability 0.2%

    first.org
  • Linux Kernel CVEVendor advisoryCVE-2026-98409

    From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: watchdog: rtd119x: Avoid division by zero clk_get_rate() could return 0. Avoid a division by zero panic. The Linux kernel CVE team has assigned CVE-2026-98409 to t

    git.kernel.org
  • Tenable CVE DatabaseVulnerability recordCVE-2026-98409

    In the Linux kernel, the following vulnerability has been resolved: watchdog: rtd119x: Avoid division by zero clk_get_rate() could return 0. Avoid a division by zero panic.

    tenable.com