PT-2026-36368 · Linux+3 · Linux+107

Published 2026-05-01 · Updated 2026-05-07 · CVE-2026-31733

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 sched ext component where the ddsp dsq id state can remain set (non-SCX DSQ INVALID), leading to a spurious warning in the mark direct dispatch() function. This occurs when a subsequent wakeup's ops.select cpu() calls scx bpf dsq insert(). The root cause is that ddsp dsq id was only cleared within dispatch enqueue(), which is not accessed in all paths that consume or cancel a direct dispatch verdict. This can be triggered in several scenarios, including when tasks are transitioned out of the current scheduler via scx disable task() while queued on a wake list with SCX OPS ALLOW QUEUED WAKEUP enabled.

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

Related Identifiers

CVE-2026-31733

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 · 14

• https://git.kernel.org/stable/c/5e7b2cc8fae9ec2a5bc53311191d2faaff75a4b5 · Patch
• https://ubuntu.com/security/CVE-2026-31733 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31733 · Security Note
• https://git.kernel.org/stable/c/7ea601daa0153e19cd1c6e6b300348c70c05fe77 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31733 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-31733 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31733 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31733 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31733 · Vendor Advisory
• https://git.kernel.org/stable/c/7e0ffb72de8aa3b25989c2d980e81b829c577010 · Patch
• https://git.kernel.org/stable/c/ca685511f7afd42cdcbb0feea42e5d332d384251 · Patch
• https://docs.bell-sw.com/security/cves/CVE-2026-31733 · Note
• https://t.me/cveNotify/162582 · Telegram Post
• https://git.kernel.org/linus/7e0ffb72de8aa3b25989c2d980e81b829c577010 · Note