Deadlock in Linux kernel - CVE-2026-45907
Published: May 28, 2026
Vulnerability identifier: #VU132579
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-45907
CWE-ID: CWE-833
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to incorrect lock ordering in devlink health reporter recovery paths in the mlx5e driver when handling recovery work triggered by device error conditions. A local user can trigger error recovery and deadlock the kernel networking stack to cause a denial of service.
The issue affects recovery flows involving mlx5e_tx_err_cqe_work, mlx5e_reporter_rx_timeout, mlx5e_reporter_tx_ptpsq_unhealthy, and mlx5e_reporter_tx_timeout.
Affected software
Linux kernel
How to mitigate CVE-2026-45907
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3