SB20260827128 - Deadlock in Linux kernel broadcom bnxt driver
Published: August 27, 2026
Security Bulletin ID
SB20260827128
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Deadlock (CVE-ID: CVE-2026-74745)
CWE-ID: CWE-833 - Deadlock
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a deadlock in the bnxt IRQ affinity notifier handling in the Broadcom bnxt network driver when processing IRQ affinity notifier updates during device operation. A remote attacker can trigger IRQ affinity updates to cause a denial of service.
The issue affects the Linux kernel bnxt driver path that restarts RX queues from the notifier callback.
Remediation
Install update from vendor's website.