SB2026100784 - NULL pointer dereference in Linux kernel bridge
Published: October 7, 2026
Security Bulletin ID
SB2026100784
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-98285)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in the bridge VLAN flushing code in net/bridge/br_vlan.c when handling switchdev deletion errors during bridge VLAN flushing. A local user can initiate bridge VLAN flushing that encounters a switchdev deletion error to cause a denial of service.
Remediation
Install update from vendor's website.