NULL pointer dereference in Linux kernel - #VU135569
Published: June 26, 2026
Vulnerability identifier: #VU135569
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in ebt_dnat_tg() in net/bridge/netfilter/ebt_dnat.c when processing NF_BR_PRE_ROUTING on a device whose bridge port has been removed. A local user can remove the bridge port before the code accesses the bridge device pointer to cause a denial of service.
Remediation
Install security update from vendor's repository.