CVE-2026-68356
watchdog: airoha: Prevent division by zero when clock frequency is zero
Description
In the Linux kernel, the following vulnerability has been resolved: watchdog: airoha: Prevent division by zero when clock frequency is zero 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.
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 6:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Check if clock frequency is zero before use.
- Return error if frequency is zero.
- Log a diagnostic error message.
- Apply vendor patches to the watchdog driver.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68356.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68356 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68356
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68356 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68356 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3cf67f3769b8227ca75ca7102180a2e270ee01aa', 'lessThan': '8681e5addf7171602616e256a09057697dcc75ca', 'versionType': 'git'}, {'status': 'affected', 'version': '3cf67f3769b8227ca75ca7102180a2e270ee01aa', 'lessThan': '57c3f5bd5be008cd5b4ff6a45b7cb90f5ca45a37', 'versionType': 'git'}, {'status': 'affected', 'version': '3cf67f3769b8227ca75ca7102180a2e270ee01aa', 'lessThan': 'bcfcd7619f277842430d197556463b401b839ee9', 'versionType': 'git'}], 'programFiles': ['drivers/watchdog/airoha_wdt.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/watchdog/airoha_wdt.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3cf67f3769b8227ca75ca7102180a2e270ee01aa', 'lessThan': '8681e5addf7171602616e256a09057697dcc75ca', 'versionType': 'git'}, {'status': 'affected', 'version': '3cf67f3769b8227ca75ca7102180a2e270ee01aa', 'lessThan': '57c3f5bd5be008cd5b4ff6a45b7cb90f5ca45a37', 'versionType': 'git'}, {'status': 'affected', 'version': '3cf67f3769b8227ca75ca7102180a2e270ee01aa', 'lessThan': 'bcfcd7619f277842430d197556463b401b839ee9', 'versionType': 'git'}], 'programFiles': ['drivers/watchdog/airoha_wdt.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/watchdog/airoha_wdt.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3cf67f3769b8227ca75ca7102180a2e270ee01aa', 'lessThan': '8681e5addf7171602616e256a09057697dcc75ca', 'versionType': 'git'}, {'status': 'affected', 'version': '3cf67f3769b8227ca75ca7102180a2e270ee01aa', 'lessThan': '57c3f5bd5be008cd5b4ff6a45b7cb90f5ca45a37', 'versionType': 'git'}, {'status': 'affected', 'version': '3cf67f3769b8227ca75ca7102180a2e270ee01aa', 'lessThan': 'bcfcd7619f277842430d197556463b401b839ee9', 'versionType': 'git'}], 'programFiles': ['drivers/watchdog/airoha_wdt.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/watchdog/airoha_wdt.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: watchdog: airoha: Prevent division by zero when clock frequency is zero 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. Added Reference https://git.kernel.org/stable/c/57c3f5bd5be008cd5b4ff6a45b7cb90f5ca45a37 Added Reference https://git.kernel.org/stable/c/8681e5addf7171602616e256a09057697dcc75ca Added Reference https://git.kernel.org/stable/c/bcfcd7619f277842430d197556463b401b839ee9