SB20260912276 - Improper locking in Linux kernel scsi fnic driver
Published: September 12, 2026
Security Bulletin ID
SB20260912276
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) Improper locking (CVE-ID: CVE-2026-89514)
CWE-ID: CWE-667 - Improper Locking
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 improper locking in the fnic_fcoe_process_vlan_resp function when processing VLAN responses. A remote attacker can send a VLAN response that causes an allocation while an IRQ-safe spinlock is held to cause a denial of service.
Remediation
Install update from vendor's website.