PT-2026-36376 · Linux+3 · Linux+128

Published 2026-05-01 · Updated 2026-05-06 · CVE-2026-31741

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the rz-mtu3-cnt counter where the Runtime PM (Power Management) counter is incremented or decremented every time the sysfs enable file is written to. Writing 0 to this file multiple times causes the Runtime PM usage count to underflow, leading to hardware registers being accessed while clocks are off within the rz mtu3 terminate counter() function to disable a channel that is already disabled. Conversely, writing 1 multiple times increments the usage count repeatedly, requiring an equal number of 0 writes to reset it. Additionally, writing 0 while PWM (Pulse Width Modulation) is in progress stops the PWM without the counter owning the underlying MTU3 channel.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-31741

Affected Products

Linux

Linux-Allwinner-5.19

Linux-Aws

Linux-Aws-5.0

Linux-Aws-5.11

Linux-Aws-5.13

Linux-Aws-5.19

Linux-Aws-5.3

Linux-Aws-5.8

Linux-Aws-6.14

Linux-Aws-6.17

Linux-Aws-6.2

Linux-Aws-6.5

Linux-Aws-6.8

Linux-Aws-Fips

Linux-Azure

Linux-Azure-5.11

Linux-Azure-5.13

Linux-Azure-5.19

Linux-Azure-5.3

Linux-Azure-5.8

Linux-Azure-6.11

Linux-Azure-6.14

Linux-Azure-6.17

Linux-Azure-6.2

Linux-Azure-6.5

Linux-Azure-6.8

Linux-Azure-Edge

Linux-Azure-Fde

Linux-Azure-Fde-5.19

Linux-Azure-Fde-6.14

Linux-Azure-Fde-6.17

Linux-Azure-Fde-6.2

Linux-Azure-Fde-6.8

Linux-Azure-Fips

Linux-Azure-Nvidia

Linux-Azure-Nvidia-6.14

Linux-Fips

Linux-Gcp

Linux-Gcp-5.11

Linux-Gcp-5.13

Linux-Gcp-5.19

Linux-Gcp-5.3

Linux-Gcp-5.8

Linux-Gcp-6.11

Linux-Gcp-6.14

Linux-Gcp-6.17

Linux-Gcp-6.2

Linux-Gcp-6.5

Linux-Gcp-6.8

Linux-Gcp-Fips

Linux-Gke

Linux-Gke-4.15

Linux-Gkeop-5.15

Linux-Gke-5.4

Linux-Gkeop

Linux-Hwe

Linux-Hwe-5.11

Linux-Hwe-5.13

Linux-Hwe-5.19

Linux-Hwe-5.8

Linux-Hwe-6.11

Linux-Hwe-6.14

Linux-Hwe-6.17

Linux-Hwe-6.2

Linux-Hwe-6.5

Linux-Hwe-6.8

Linux-Hwe-Edge

Linux-Ibm

Linux-Ibm-6.8

Linux-Intel-5.13

Linux-Intel-Iot-Realtime

Linux-Lowlatency

Linux-Lowlatency-Hwe-5.19

Linux-Lowlatency-Hwe-6.11

Linux-Lowlatency-Hwe-6.2

Linux-Lowlatency-Hwe-6.5

Linux-Lowlatency-Hwe-6.8

Linux-Lts

Linux-Nvidia

Linux-Nvidia-6.11

Linux-Nvidia-6.2

Linux-Nvidia-6.5

Linux-Nvidia-6.8

Linux-Nvidia-Lowlatency

Linux-Nvidia-Tegra

Linux-Oem

Linux-Oem-5.10

Linux-Oem-5.13

Linux-Oem-5.14

Linux-Oem-5.17

Linux-Oem-5.6

Linux-Oem-6.0

Linux-Oem-6.1

Linux-Oem-6.11

Linux-Oem-6.14

Linux-Oem-6.17

Linux-Oem-6.5

Linux-Oem-6.8

Linux-Oracle

Linux-Oracle-5.0

Linux-Oracle-5.11

Linux-Oracle-5.13

Linux-Oracle-5.3

Linux-Oracle-5.8

Linux-Oracle-6.14

Linux-Oracle-6.17

Linux-Oracle-6.5

Linux-Oracle-6.8

Linux-Raspi

Linux-Raspi-Realtime

Linux-Raspi2

Linux-Realtime

Linux-Realtime-6.14

Linux-Realtime-6.17

Linux-Realtime-6.8

Linux-Riscv

Linux-Riscv-5.11

Linux-Riscv-5.19

Linux-Riscv-5.8

Linux-Riscv-6.14

Linux-Riscv-6.17

Linux-Riscv-6.5

Linux-Riscv-6.8

Linux-Starfive-5.19

Linux-Starfive-6.2

Linux-Starfive-6.5

Linux-Xilinx

Linux Kernel

References · 14

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31741 · Vendor Advisory
• https://git.kernel.org/stable/c/ced8b48420eddb1251f93c22dc23fa136490b3cd · Patch
• https://git.kernel.org/stable/c/e07237df8538b0ae98dce112e4f6db093d767f80 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31741 · Vendor Advisory
• https://git.kernel.org/stable/c/67c3f99bed6f422ba343d2b70a2eeeccdfd91bef · Patch
• https://git.kernel.org/stable/c/f5f6f06d7e6d262026578b59ba7426eb04acce5d · Patch
• https://git.kernel.org/stable/c/885aa739a07ab45e90dfa997205acec97979ce4e · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31741 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31741 · Security Note
• https://ubuntu.com/security/CVE-2026-31741 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31741 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31741 · Vendor Advisory
• https://git.kernel.org/linus/67c3f99bed6f422ba343d2b70a2eeeccdfd91bef · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-31741 · Note