Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (powerz) Fix use-after-free on USB disconnect After powerz_disconnect() frees the URB and releases the mutex, a subsequent powerz_read() call can acquire the mutex and call powerz_read_data(), which dereferences the freed URB pointer. Fix by: - Setting priv->urb to NULL in powerz_disconnect() so that powerz_read_data() can detect the disconnected state. - Adding a !priv->urb check at the start of powerz_read_data() to return -ENODEV on a disconnected device. - Moving usb_set_intfdata() before hwmon registration so the disconnect handler can always find the priv pointer.
Affected products
linux: linux kernel
References5
- git.kernel.org/stable/c/08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4 Patch
- git.kernel.org/stable/c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4 Patch
- git.kernel.org/stable/c/7003ae4810ca83f0ddca85b768500e313c4b998c Patch
- git.kernel.org/stable/c/9e1b798257f96d2e2a2639830eb71add545ce749 Patch
- git.kernel.org/stable/c/c78e1d4e48f23792adaa7c94251e22b0d9700a39 Patch
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 13 November 2026
- CWE
- CWE-416
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