PT-2026-36429 · Linux · Linux Kernel

CVE-2026-43012 · Published 2026-05-01 · Updated 2026-07-20

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 net/mlx5 component where a failure during switchdev mode transition triggers an incorrect rollback to legacy mode. This process unregisters the uplink netdev and leaves it in an unregistered state, leading to a kernel bug. The problem is related to the failure to set the MLX5 PRIV FLAGS SWITCH LEGACY flag during the rollback process.

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

Exploit

Related Identifiers

CVE-2026-43012

OPENSUSE-SU-2026:20912-1

SUSE-SU-2026:22043-1

SUSE-SU-2026:22048-1

SUSE-SU-2026:22076-1

SUSE-SU-2026:22087-1

USN-8567-1

Affected Products

Linux Kernel

References · 1001

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43012.json · Exploit
• https://ubuntu.com/security/CVE-2026-52992 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45842 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-52920 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23339 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53122 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46078 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46179 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43436 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23460 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43451 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31545 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23330 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31583 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23227 · Vendor Advisory