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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.

Timeline

  1. ID reserved

    By Linux

  2. · 11 days later

    Published

  3. · 7 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.

EPSS (exploitation in 30 days)
0.17% · top 94% of all CVEs (9 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected 3cf67f3769b8227ca75ca7102180a2e270ee01aa – < 8681e5addf7171602616e256a09057697dcc75ca
    • affected 3cf67f3769b8227ca75ca7102180a2e270ee01aa – < 57c3f5bd5be008cd5b4ff6a45b7cb90f5ca45a37
    • affected 3cf67f3769b8227ca75ca7102180a2e270ee01aa – < bcfcd7619f277842430d197556463b401b839ee9
  • Linux · Linux

    • affected 6.13
    • unaffected < 6.13
    • unaffected 6.18.42 – ≤ 6.18.*
    • unaffected 7.1.6 – ≤ 7.1.*
    • unaffected 7.2 – ≤ *

References

3

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .