PT-2026-37462 · Linux+2 · Linux+91

Published 2026-05-06 · Updated 2026-05-06 · CVE-2026-43122

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issue exists in the ACPI processor component where the cpuidle driver check in the acpi processor start() function is outdated. Due to changes that moved idle driver registration to acpi processor driver init(), the acpi processor power init() function no longer registers an idle driver. Consequently, calling acpi processor power init() without a cpuidle driver can lead to a NULL pointer dereference—a condition where the software attempts to read from a memory address that is not valid—within the cpuidle register device() function.

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

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-43122

Affected Products

Linux

Linux-Allwinner-5.19

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-6.2

Linux-Aws-6.5

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-6.2

Linux-Azure-6.5

Linux-Azure-Edge

Linux-Azure-Fde

Linux-Azure-Fde-5.19

Linux-Azure-Fde-6.2

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-6.2

Linux-Gcp-6.5

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-6.2

Linux-Hwe-6.5

Linux-Hwe-Edge

Linux-Intel-5.13

Linux-Intel-Iot-Realtime

Linux-Lowlatency-Hwe-5.19

Linux-Lowlatency-Hwe-6.11

Linux-Lowlatency-Hwe-6.2

Linux-Lowlatency-Hwe-6.5

Linux-Nvidia

Linux-Nvidia-6.11

Linux-Nvidia-6.2

Linux-Nvidia-6.5

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-6.5

Linux-Oem-6.8

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-6.5

Linux-Raspi-Realtime

Linux-Raspi2

Linux-Realtime

Linux-Realtime-6.14

Linux-Riscv

Linux-Riscv-5.11

Linux-Riscv-5.19

Linux-Riscv-5.8

Linux-Riscv-6.14

Linux-Riscv-6.5

Linux-Starfive-5.19

Linux-Starfive-6.2

Linux-Starfive-6.5

Linux Kernel

References · 10

• https://git.kernel.org/stable/c/0089ce1c056aee547115bdc25c223f8f88c08498 · Patch
• https://cve.org/CVERecord?id=CVE-2026-43122 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43122 · Security Note
• https://git.kernel.org/stable/c/68f38f648e4b5bed2aeadd2f711e25302e6490f8 · Patch
• https://git.kernel.org/stable/c/6cfed39c2ce64ac024bbde458a9727105e0b8c66 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43122 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43122 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43122 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43122 · Vendor Advisory
• https://git.kernel.org/linus/0089ce1c056aee547115bdc25c223f8f88c08498 · Note