PT-2026-36401 · Linux+2 · Linux+103

Published 2026-05-01 · Updated 2026-05-01 · CVE-2026-31766

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description The amdgpu userq get doorbell index() function passes a user-provided doorbell offset to amdgpu doorbell index on bar() without performing bounds checking. An excessively large doorbell offset can result in a calculated doorbell index that falls outside the allocated doorbell Buffer Object (BO), which may lead to the corruption of kernel doorbell space.

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

Related Identifiers

CVE-2026-31766

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-6.17

Linux-Azure-6.2

Linux-Azure-6.5

Linux-Azure-Edge

Linux-Azure-Fde

Linux-Azure-Fde-5.19

Linux-Azure-Fde-6.17

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-6.17

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-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 · 10

• https://cve.org/CVERecord?id=CVE-2026-31766 · Security Note
• https://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c · Patch
• https://ubuntu.com/security/CVE-2026-31766 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31766 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31766 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31766 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31766 · Vendor Advisory
• https://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6 · Patch
• https://git.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3 · Patch
• https://git.kernel.org/linus/a018d1819f158991b7308e4f74609c6c029b670c · Note