PT-2026-40688 · Linux+3 · Linux+109

Published 2026-05-13 · Updated 2026-06-26 · CVE-2026-43481

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 net-shapers component where the reply socket buffer (skb) is freed twice. The genlmsg reply() function transfers the reply skb to netlink, and netlink unicast() consumes it regardless of whether the skb is queued successfully or freed during an error path. However, the functions net shaper nl get doit() and net shaper nl cap get doit() jump to free msg after genlmsg reply() fails and call nlmsg free(msg), leading to a double free of the same skb.

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

Related Identifiers

CVE-2026-43481

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-Bluefield

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-6.11

Linux-Nvidia-6.17

Linux-Nvidia-6.2

Linux-Nvidia-6.5

Linux-Nvidia-7.0

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/8738dcc844fff7d0157ee775230e95df3b1884d7 · Patch
• https://git.kernel.org/stable/c/83f7b54242d0abbfce35a55c01322f50962ed3ee · Patch
• https://cve.org/CVERecord?id=CVE-2026-43481 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43481 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43481 · Vendor Advisory
• https://git.kernel.org/stable/c/57885276cc16a2e2b76282c808a4e84cbecb3aae · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43481 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43481 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43481 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43481 · Vendor Advisory
• https://docs.bell-sw.com/security/cves/CVE-2026-43481 · Note
• https://git.kernel.org/linus/57885276cc16a2e2b76282c808a4e84cbecb3aae · Note
• https://t.me/cveNotify/177591 · Telegram Post
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post