High 7.8Published Apr 24, 2026

CVE-2026-31582hwmon: (powerz) Fix use-after-free on USB disconnect

Updated under an hour ago (Oct 27, 2026, 7:00 PM ET)

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Exploited in the last 30 days

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: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Jun 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 4381a36abdf1c5c0323c1c51f869dc000115eb20 before c78e1d4e48f23792adaa7c94251e22b0d9700a39; 4381a36abdf1c5c0323c1c51f869dc000115eb20 builds before 9e1b798257f96d2e2a2639830eb71add545ce749; from 4381a36abdf1c5c0323c1c51f869dc000115eb20 before 7003ae4810ca83f0ddca85b768500e313c4b998c; 4381a36abdf1c5c0323c1c51f869dc000115eb20 builds before 61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4; 4381a36abdf1c5c0323c1c51f869dc000115eb20 builds before 08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4	CNA record
linux linux_kernel linux:linux_kernel	before 6.12.83; from 6.13 before 6.18.24; from 6.19 before 6.19.14; from 7.0 before 7.0.1	NVD

References

References

https://git.kernel.org/stable/c/c78e1d4e48f23792adaa7c94251e22b0d9700a39	patch
https://git.kernel.org/stable/c/9e1b798257f96d2e2a2639830eb71add545ce749	patch
https://git.kernel.org/stable/c/7003ae4810ca83f0ddca85b768500e313c4b998c	patch
https://git.kernel.org/stable/c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4	patch
https://git.kernel.org/stable/c/08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.