Improper initialization in Linux kernel - CVE-2026-98304

Vulnerability identifier: #VU153718

CSH Severity: Low

CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98304

CWE-ID: CWE-665

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local privileged user to discard configured hardware filter rules.

The vulnerability exists due to improper reinitialization of the hardware filter rule list in bcmgenet_hfb_init() when reopening a network interface. A local privileged user can bring the interface down and back up to discard configured hardware filter rules.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/23ca4ddc4fce2c233a49e9fd34d4b5b02bd7324e
• https://git.kernel.org/stable/c/56db7ec462d6a2b886e299ad835109c089606969
• https://git.kernel.org/stable/c/906140955c8debde65afe12e594e04c49a61b0d9

• Improper initialization in Linux kernel broadcom genet driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more