PT-2026-37551 · Linux+3 · Linux+152

Keith · Published 2026-05-06 · Updated 2026-05-07 · CVE-2026-43211

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 slot trylock() function where error handling is incorrectly implemented. Following a change that delegated the bridge device's pci dev trylock() to pci bus trylock(), the corresponding pci dev unlock() call was not removed from the failure path. This results in the system attempting to unlock a device that was not locked, leading to either a warning that a lock is being released without being held or the incorrect unlocking of a lock belonging to another thread.

Recommendations Remove the redundant pci dev unlock() call on the failure path within the pci slot trylock() function.

Fix

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

CVE-2026-43211

Affected Products

Linux

Linux-Allwinner-5.19

Linux-Aws

Linux-Aws-5.0

Linux-Aws-5.11

Linux-Aws-5.13

Linux-Aws-5.15

Linux-Aws-5.19

Linux-Aws-5.3

Linux-Aws-5.4

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-5.15

Linux-Azure-5.19

Linux-Azure-5.3

Linux-Azure-5.4

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-5.15

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-Bluefield

Linux-Fips

Linux-Gcp

Linux-Gcp-5.11

Linux-Gcp-5.13

Linux-Gcp-5.15

Linux-Gcp-5.19

Linux-Gcp-5.3

Linux-Gcp-5.4

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-5.15

Linux-Hwe-5.19

Linux-Hwe-5.4

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-5.15

Linux-Ibm-5.4

Linux-Ibm-6.8

Linux-Intel-5.13

Linux-Intel-Iot-Realtime

Linux-Intel-Iotg

Linux-Intel-Iotg-5.15

Linux-Iot

Linux-Kvm

Linux-Lowlatency

Linux-Lowlatency-Hwe-5.15

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-Nvidia-Tegra-5.15

Linux-Nvidia-Tegra-Igx

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-5.15

Linux-Oracle-5.3

Linux-Oracle-5.4

Linux-Oracle-5.8

Linux-Oracle-6.14

Linux-Oracle-6.17

Linux-Oracle-6.5

Linux-Oracle-6.8

Linux-Raspi

Linux-Raspi-5.4

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-5.15

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-Xilinx-Zynqmp

Linux Kernel

References · 17

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43211 · Vendor Advisory
• https://git.kernel.org/stable/c/943ed56606a7ab2fe5a99cad572dd17d484310c7 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43211 · Vendor Advisory
• https://git.kernel.org/stable/c/bd435f4b738130d732ef64e0e57e45185f77165d · Patch
• https://git.kernel.org/stable/c/ebb27b7399ab8b9eb1f792b329aa5f6250c590d4 · Patch
• https://git.kernel.org/stable/c/fbe06a3058114bf95a17a4941b205f4b321c6f0a · Patch
• https://git.kernel.org/stable/c/8b08ea9690b212b7bf7f12414039259cf34b1aa0 · Patch
• https://git.kernel.org/stable/c/a19b61fdb958ffadbba85b43c991eb9fc70c1c1c · Patch
• https://git.kernel.org/stable/c/9368d1ee62829b08aa31836b3ca003803caf0b72 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43211 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43211 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43211 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43211 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43211 · Security Note
• https://git.kernel.org/stable/c/0425aaf20b407d2f2cf3bf469808e4a35f9abb8b · Patch