CVE-2026-31582

HIGH EPSS 2.6%
Published Apr 24, 20262mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
2.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel* <6.12.83
linuxlinux_kernel*≥6.13  –  <6.18.24
linuxlinux_kernel*≥6.19  –  <6.19.14
linuxlinux_kernel*≥7.0  –  <7.0.1

References 5

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

Remediation

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