CVE-2026-31582
hwmon: (powerz) Fix use-after-free on USB disconnect
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
6.7