SB20260919118 - Improper locking in Linux kernel microchip sparx5 driver
Published: September 19, 2026
Security Bulletin ID
SB20260919118
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper locking (CVE-ID: CVE-2026-90098)
CWE-ID: CWE-667 - Improper Locking
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper locking in the Sparx5 network driver MAC table access path when synchronizing multicast addresses during receive-mode configuration. A local user can trigger multicast address synchronization while opening a network device to cause a denial of service.
Remediation
Install update from vendor's website.