Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 before c78e1d4e48f23792adaa7c94251e22b0d9700a39; affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 before 9e1b798257f96d2e2a2639830eb71add545ce749; affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 before 7003ae4810ca83f0ddca85b768500e313c4b998c; affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 before 61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4; affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 before 08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4 |
| Linux / Linux | affected 6.7; unaffected 0 before 6.7; unaffected 6.12.83 through 6.12.*; unaffected 6.18.24 through 6.18.*; unaffected 6.19.14 through 6.19.*; unaffected 7.0.1 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
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