Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 6.12.83 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4Patch
- https://git.kernel.org/stable/c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4Patch
- https://git.kernel.org/stable/c/7003ae4810ca83f0ddca85b768500e313c4b998cPatch
- https://git.kernel.org/stable/c/9e1b798257f96d2e2a2639830eb71add545ce749Patch
- https://git.kernel.org/stable/c/c78e1d4e48f23792adaa7c94251e22b0d9700a39Patch
FAQ
What is CVE-2026-31582?
CVE-2026-31582 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 ...
How severe is CVE-2026-31582?
CVE-2026-31582 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31582?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.