CVE-2026-31741

MEDIUM EPSS 2.3%
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: counter: rz-mtu3-cnt: prevent counter from being toggled multiple times Runtime PM counter is incremented / decremented each time the sysfs enable file is written to. If user writes 0 to the sysfs enable file multiple times, runtime PM usage count underflows, generating the following message. rz-mtu3-counter rz-mtu3-counter.0: Runtime PM usage count underflow! At the same time, hardware registers end up being accessed with clocks off in rz_mtu3_terminate_counter() to disable an already disabled channel. If user writes 1 to the sysfs enable file multiple times, runtime PM usage count will be incremented each time, requiring the same number of 0 writes to get it back to 0. If user writes 0 to the sysfs enable file while PWM is in progress, PWM is stopped without counter being the owner of the underlying MTU3 channel. Check against the cached count_is_enabled value and exit if the user is trying to set the same enable value.

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
2.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥6.4  –  <6.6.134
linuxlinux_kernel*≥6.7  –  <6.12.81
linuxlinux_kernel*≥6.13  –  <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

References 5

  • git.kernel.org https://git.kernel.org/stable/c/67c3f99bed6f422ba343d2b70a2eeeccdfd91bef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/885aa739a07ab45e90dfa997205acec97979ce4e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ced8b48420eddb1251f93c22dc23fa136490b3cd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e07237df8538b0ae98dce112e4f6db093d767f80
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f5f6f06d7e6d262026578b59ba7426eb04acce5d
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/67c3f99bed6f422ba343d2b70a2eeeccdfd91bef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/885aa739a07ab45e90dfa997205acec97979ce4e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ced8b48420eddb1251f93c22dc23fa136490b3cd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e07237df8538b0ae98dce112e4f6db093d767f80
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f5f6f06d7e6d262026578b59ba7426eb04acce5d
    Patch