PT-2026-36371 · Linux+3 · Linux+107

Published 2026-05-01 · Updated 2026-05-06 · CVE-2026-31736

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 A NULL pointer dereference occurs in the mtk ppe component of the ethernet network subsystem when gmac0 is disabled. The system crashes because the code attempts to access netdev ops directly while eth->netdev[0] is NULL. This happens during the precheck for a valid ingress device, which incorrectly only checks the first net device instead of verifying if any mtk eth net devices match the netdev ops of the ingress device.

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-2026-31736

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-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-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-Nvidia-6.14

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-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-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-Lts

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-6.17

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-Raspi

Linux-Raspi-Realtime

Linux-Raspi2

Linux-Realtime

Linux-Realtime-6.14

Linux-Realtime-6.17

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-Starfive-5.19

Linux-Starfive-6.2

Linux-Starfive-6.5

Linux Kernel

References · 13

• https://nvd.nist.gov/vuln/detail/CVE-2026-31736 · Security Note
• https://ubuntu.com/security/CVE-2026-31736 · Vendor Advisory
• https://git.kernel.org/stable/c/7b2380f0a0e374010c1a4a13203511b9dee5b166 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31736 · Vendor Advisory
• https://git.kernel.org/stable/c/5dff799c677152dde963c3917bacd9127b03e145 · Patch
• https://git.kernel.org/stable/c/976ff48c2ac6e6b25b01428c9d7997bcd0fb2949 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31736 · Vendor Advisory
• https://git.kernel.org/stable/c/0b832aad33e6f160fda310f0306a6483d85e9d6e · Patch
• https://cve.org/CVERecord?id=CVE-2026-31736 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31736 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31736 · Vendor Advisory
• https://git.kernel.org/linus/976ff48c2ac6e6b25b01428c9d7997bcd0fb2949 · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-31736 · Note