watchdog: airoha: Prevent division by zero when clock frequency is zero
Published Aug 10, 2026
5.5
MEDIUMCVSS 3.1
EPSS 0.21%
Description
clk_get_rate() can return 0 when the clock provider is not properly configured or the clock is unmanaged. The driver uses wdt_freq as a divisor directly in airoha_wdt_probe() to compute max_timeout and in airoha_wdt_get_timeleft() to compute the remaining time, which results in a division by zero.
Add a check for wdt_freq == 0 in probe and return -EINVAL with dev_err_probe() to prevent the division by zero and provide a diagnostic message.
Affected products
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 6.13StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<6.13
- Version 6.18.42StatusunaffectedConstraints<=6.18.*
- Version 7.1.6StatusunaffectedConstraints<=7.1.*
- Version 7.2StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
No data.
No data.
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
Red Hat Enterprise Linux for NVIDIA 26
kernel
Not affected
Red Hat OpenShift Container Platform 4
openshift/ose-rhel-coreos-8
Not affected
Red Hat OpenShift Container Platform 4
openshift/ose-rhel-coreos-9
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux for NVIDIA 26 | kernel | Not affected | n/a |
| Red Hat OpenShift Container Platform 4 | openshift/ose-rhel-coreos-8 | Not affected | n/a |
| Red Hat OpenShift Container Platform 4 | openshift/ose-rhel-coreos-9 | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects Airoha watchdog. clk_get_rate() returning 0 causes division by zero. Airoha SoC platforms only.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.21% (0.00206) | 9.63th | v5 (v2026.06.15) |
| Aug 11, 2026 | 0.17% (0.00166) | 6.21th | v5 (v2026.06.15) |
References (8)
- https://access.redhat.com/security/cve/CVE-2026-68356 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2513239 Issue Tracking
- https://git.kernel.org/stable/c/57c3f5bd5be008cd5b4ff6a45b7cb90f5ca45a37
- https://git.kernel.org/stable/c/8681e5addf7171602616e256a09057697dcc75ca
- https://git.kernel.org/stable/c/bcfcd7619f277842430d197556463b401b839ee9
- https://lore.kernel.org/linux-cve-announce/2026081040-CVE-2026-68356-0c29@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2026-68356
- https://www.cve.org/CVERecord?id=CVE-2026-68356
Change history (0)
No recorded changes yet.