PT-2026-37550 · Linux+3 · Linux+107

Published 2026-05-06 · Updated 2026-05-07 · CVE-2026-43210

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 tracing ring-buffer where the rb read data buffer() function fails to verify the event length before using it to access the next index. Because this function validates potentially corrupted ring buffers, an incorrect event length can cause the calculation of the next event address (e + len) to point to an invalid memory location, potentially leading to invalid memory access during boot.

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

Related Identifiers

CVE-2026-43210

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://git.kernel.org/stable/c/9eb80e54494ef1efef8a64bec4ffa672c9cf411e · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43210 · Vendor Advisory
• https://git.kernel.org/stable/c/5026010110a5ad2268d8c23e1e286ab7c736f7ac · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43210 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43210 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43210 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43210 · Security Note
• https://git.kernel.org/stable/c/912b0ee248c529a4f45d1e7f568dc1adddbf2a4a · Patch
• https://cve.org/CVERecord?id=CVE-2026-43210 · Security Note
• https://git.kernel.org/stable/c/b4700c089a10f89de3a5149d57f8a58306458982 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43210 · Vendor Advisory
• https://docs.bell-sw.com/security/cves/CVE-2026-43210 · Note
• https://git.kernel.org/linus/912b0ee248c529a4f45d1e7f568dc1adddbf2a4a · Note