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
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
4381a36abdf1c5c0323c1c51f869dc000115eb20 to < c78e1d4e48f23792adaa7c94251e22b0d9700a39affected4381a36abdf1c5c0323c1c51f869dc000115eb20 to < 9e1b798257f96d2e2a2639830eb71add545ce749affected4381a36abdf1c5c0323c1c51f869dc000115eb20 to < 7003ae4810ca83f0ddca85b768500e313c4b998caffected4381a36abdf1c5c0323c1c51f869dc000115eb20 to < 61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4affected4381a36abdf1c5c0323c1c51f869dc000115eb20 to < 08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4affected
Linux Linux
Default version status: affected
6.7affected0 to < 6.7unaffected6.12.83 to ≤ 6.12.*unaffected6.18.24 to ≤ 6.18.*unaffected6.19.14 to ≤ 6.19.*unaffected7.0.1 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/c78e1d4e48f23792adaa7c94251e22b0d9700a39 ↗
- https://git.kernel.org/stable/c/9e1b798257f96d2e2a2639830eb71add545ce749 ↗
- https://git.kernel.org/stable/c/7003ae4810ca83f0ddca85b768500e313c4b998c ↗
- https://git.kernel.org/stable/c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4 ↗
- https://git.kernel.org/stable/c/08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4 ↗