PT-2026-37580 · Linux+3 · Linux+128

Published 2026-05-06 · Updated 2026-05-07 · CVE-2026-43240

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 x86 architecture during the kexec process. When a second-stage kernel is booted using a limiting command line, such as mem=<size>, the physical range containing the carried over IMA (Integrity Measurement Architecture) measurement list may fall outside the truncated RAM. This can result in a kernel panic due to a page fault in the ima restore measurement list() function. Failure to carry the measurement list across kexec would lead to attestation failure.

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

Related Identifiers

CVE-2026-43240

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-Aws-6.8

Linux-Aws-Fips

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-6.8

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-Fde-6.8

Linux-Azure-Fips

Linux-Azure-Nvidia

Linux-Azure-Nvidia-6.14

Linux-Fips

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-Gcp-6.8

Linux-Gcp-Fips

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-6.8

Linux-Hwe-Edge

Linux-Ibm

Linux-Ibm-6.8

Linux-Intel-5.13

Linux-Intel-Iot-Realtime

Linux-Lowlatency

Linux-Lowlatency-Hwe-5.19

Linux-Lowlatency-Hwe-6.11

Linux-Lowlatency-Hwe-6.2

Linux-Lowlatency-Hwe-6.5

Linux-Lowlatency-Hwe-6.8

Linux-Lts

Linux-Nvidia

Linux-Nvidia-6.11

Linux-Nvidia-6.2

Linux-Nvidia-6.5

Linux-Nvidia-6.8

Linux-Nvidia-Lowlatency

Linux-Nvidia-Tegra

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-Oracle-6.8

Linux-Raspi

Linux-Raspi-Realtime

Linux-Raspi2

Linux-Realtime

Linux-Realtime-6.14

Linux-Realtime-6.17

Linux-Realtime-6.8

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-Riscv-6.8

Linux-Starfive-5.19

Linux-Starfive-6.2

Linux-Starfive-6.5

Linux-Xilinx

Linux Kernel

References · 15

• https://git.kernel.org/stable/c/d4a132f121c591b60dbaf57ea91f1faf11631fbc · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43240 · Security Note
• https://git.kernel.org/stable/c/4d7a8f5f28187e3d2958b2a134473da2665207e7 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43240 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43240 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43240 · Security Note
• https://git.kernel.org/stable/c/c5489d04337b47e93c0623e8145fcba3f5739efd · Patch
• https://git.kernel.org/stable/c/22e460b6333a5f818b042ac89201f8e735556f4a · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43240 · Vendor Advisory
• https://git.kernel.org/stable/c/f8f73bf0f8a57ee9b86792456bd42079bc98c6b7 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43240 · Vendor Advisory
• https://git.kernel.org/stable/c/37f18915a261afe84dab462624ed829cddb77a9b · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43240 · Vendor Advisory
• https://git.kernel.org/linus/c5489d04337b47e93c0623e8145fcba3f5739efd · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-43240 · Note