Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-31582

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
24/04/2026
Last modified:
27/04/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> hwmon: (powerz) Fix use-after-free on USB disconnect<br /> <br /> After powerz_disconnect() frees the URB and releases the mutex, a<br /> subsequent powerz_read() call can acquire the mutex and call<br /> powerz_read_data(), which dereferences the freed URB pointer.<br /> <br /> Fix by:<br /> - Setting priv-&gt;urb to NULL in powerz_disconnect() so that<br /> powerz_read_data() can detect the disconnected state.<br /> - Adding a !priv-&gt;urb check at the start of powerz_read_data()<br /> to return -ENODEV on a disconnected device.<br /> - Moving usb_set_intfdata() before hwmon registration so the<br /> disconnect handler can always find the priv pointer.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.12.83 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.24 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 6.19.14 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 7.0 (including) 7.0.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools