PT-2026-37407 · Linux+2 · Linux+91

Published 2026-05-06 · Updated 2026-05-14 · CVE-2026-43097

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description An issue exists in the PCI Hyper-V driver where a double free of a domain number occurs during the error path of the hv pci probe() function. If the function fails after storing the domain number in hbus->bridge->domain nr, the domain number is freed via pci bus release emul domain nr(). Subsequently, the bridge release callback pci release host bridge dev() attempts to free the same domain number again, leading to a double call of the ida free() function.

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

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

CVE-2026-43097

Affected Products

Linux

Linux-Allwinner-5.19

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-6.2

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-6.2

Linux-Azure-6.5

Linux-Azure-Edge

Linux-Azure-Fde

Linux-Azure-Fde-5.19

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-6.2

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-6.2

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-6.5

Linux-Oem-6.8

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-6.5

Linux-Raspi-Realtime

Linux-Raspi2

Linux-Realtime

Linux-Realtime-6.14

Linux-Riscv

Linux-Riscv-5.11

Linux-Riscv-5.19

Linux-Riscv-5.8

Linux-Riscv-6.14

Linux-Riscv-6.5

Linux-Starfive-5.19

Linux-Starfive-6.2

Linux-Starfive-6.5

Linux Kernel

References · 10

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43097 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43097 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43097 · Vendor Advisory
• https://git.kernel.org/stable/c/b6422dff0e518245019233432b6bccfc30b73e2f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43097 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-43097 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43097 · Security Note
• https://git.kernel.org/stable/c/21bc8e0ba5c2a081b0a2808c976d4c9dbddf1e48 · Patch
• https://git.kernel.org/linus/b6422dff0e518245019233432b6bccfc30b73e2f · Note
• https://t.me/cveNotify/163510 · Telegram Post