CVE-2026-74329
Description
In the Linux kernel, the following vulnerability has been resolved: watchdog: unregister PM notifier on watchdog unregister watchdog_register_device() registers wdd->pm_nb when WDOG_NO_PING_ON_SUSPEND is set, but watchdog_unregister_device() does not remove it. This leaves an embedded notifier block on the PM notifier chain after the watchdog device has been unregistered. A later suspend/resume notification can then call watchdog_pm_notifier() with a stale watchdog_device pointer, or at minimum after wdd->wd_data has been cleared by watchdog_dev_unregister(). Unregister the PM notifier before tearing down the watchdog device.
How to fix
- Linux Linuxcd2d1b1f99308f7680d75a377daaff363f1cc736, 5d9b58ec6f5de5e159a570d419b1b08b3b9f854b, 89184909634e50d086d86d8a0c03fc86fe8d889f, e690afea5c876a4abfa2978c6a664460ed7d1217, 298821692d447c2f7b1bc9ef41cd88a31bf56436, c70b5bb6f04f77ef90e047d7edc2f476e206909f, a298c7302ee9584a7a1ac1e8acbede8d98ab51a4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 ≤ v < cd2d1b1f99308f7680d75a377daaff363f1cc736, 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 ≤ v < 5d9b58ec6f5de5e159a570d419b1b08b3b9f854b, 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 ≤ v < 89184909634e50d086d86d8a0c03fc86fe8d889f, 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 ≤ v < e690afea5c876a4abfa2978c6a664460ed7d1217, 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 ≤ v < 298821692d447c2f7b1bc9ef41cd88a31bf56436, 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 ≤ v < c70b5bb6f04f77ef90e047d7edc2f476e206909f, 60bcd91aafd22ef62cef9ae2037fa2e1d4da2fb3 ≤ v < a298c7302ee9584a7a1ac1e8acbede8d98ab51a4, 5.15 | cd2d1b1f99308f7680d75a377daaff363f1cc736, 5d9b58ec6f5de5e159a570d419b1b08b3b9f854b, 89184909634e50d086d86d8a0c03fc86fe8d889f, e690afea5c876a4abfa2978c6a664460ed7d1217, 298821692d447c2f7b1bc9ef41cd88a31bf56436, c70b5bb6f04f77ef90e047d7edc2f476e206909f, a298c7302ee9584a7a1ac1e8acbede8d98ab51a4 |
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