CVE-2026-31756

MEDIUM EPSS 0.8%
Published May 1, 20261mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 1, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop() dwc2_gadget_exit_clock_gating() internally calls call_gadget() macro, which expects hsotg->lock to be held since it does spin_unlock/spin_lock around the gadget driver callback invocation. However, dwc2_hsotg_udc_stop() calls dwc2_gadget_exit_clock_gating() without holding the lock. This leads to: - spin_unlock on a lock that is not held (undefined behavior) - The lock remaining held after dwc2_gadget_exit_clock_gating() returns, causing a deadlock when spin_lock_irqsave() is called later in the same function. Fix this by acquiring hsotg->lock before calling dwc2_gadget_exit_clock_gating() and releasing it afterwards, which satisfies the locking requirement of the call_gadget() macro.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
0.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-667

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥5.15.187  –  <5.15.203
linuxlinux_kernel*≥6.1.143  –  <6.1.168
linuxlinux_kernel*≥6.6.96  –  <6.6.134
linuxlinux_kernel*≥6.12.36  –  <6.12.81
linuxlinux_kernel*≥6.15.5  –  <6.18.22
linuxlinux_kernel*≥6.19  –  <6.19.12
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/51b62286fc668c6eb74dee7624ec0beec3c5a0ed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/61937f686290494998236c680ce0836b8dd63a3f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8ffe31acb3b77a30ae34d01719a269881569fb7f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/beab10429439e20708036a66fb0d97ffb79da6a1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e9fcca3e87463013d595c65c2189ffaa32ad3b50
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/51b62286fc668c6eb74dee7624ec0beec3c5a0ed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/61937f686290494998236c680ce0836b8dd63a3f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8ffe31acb3b77a30ae34d01719a269881569fb7f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/beab10429439e20708036a66fb0d97ffb79da6a1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e9fcca3e87463013d595c65c2189ffaa32ad3b50
    Patch