PT-2026-43840 · Linux+1 · Linux Kernel+1

CVE-2026-45973 · Published 2026-05-27 · Updated 2026-07-28

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 A race condition in the RDMA/mlx5 driver occurs during firmware reset in LAG mode, causing the driver to hang indefinitely while waiting for UMR completion during device unload. In LAG mode, the bond device is registered only on the master, preventing it from receiving sys error events from the slave. Consequently, during a firmware reset, UMR posts succeed but completions never arrive because the slave is inactive while the master has not yet entered an error state.

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

Exploit

Related Identifiers

CVE-2026-45973

OESA-2026-2676

USN-8492-1

USN-8492-2

USN-8492-3

USN-8492-4

USN-8492-5

USN-8497-1

USN-8498-1

USN-8499-1

USN-8606-1

USN-8607-1

USN-8609-1

USN-8619-1

Affected Products

Linuxmint

Linux Kernel

References · 1518

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45973.json · Exploit
• https://ubuntu.com/security/CVE-2026-31730 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43445 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31720 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45938 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-63860 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45991 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68736 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43227 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23343 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45999 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53304 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31725 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46018 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23339 · Vendor Advisory