Race condition in Linux kernel - CVE-2026-98624

Vulnerability identifier: #VU156934

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-98624

CWE-ID: CWE-362

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service by triggering a kernel fault.

The vulnerability exists due to a race condition in the Linux kernel nfnetlink_queue component when socket release notifications and queue configuration requests are processed concurrently. A local user can race a socket close() operation against an UNBIND request from another socket using the same portid to trigger concurrent queue destruction and cause a denial of service.

Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws (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-nvidia-tegra (Ubuntu package) - update to 5.15.0-1070.72
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux (Ubuntu package) - update to 7.0.0-42.42
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
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/07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1
• https://git.kernel.org/stable/c/1d1184411599a7c2217560bab3bbe641c6d03b95
• https://git.kernel.org/stable/c/2e9be1302f25c9be51c2fb8c907bc6d8a1050e33
• https://git.kernel.org/stable/c/46432f2e76f7c385d82506304a2928e7d293289f
• https://git.kernel.org/stable/c/597320337c3da06c92a9e95cfc755da66fedc476
• https://git.kernel.org/stable/c/8137a39e08e838ced234044384740ceeb99ed388
• https://git.kernel.org/stable/c/9461613afc59acef44a0071b0dd5075f6e993ffe
• https://git.kernel.org/stable/c/d559e06a5ab7c064100aafd5c826eadd0f1c6216

• Race condition in Linux kernel netfilter
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more
• Ubuntu update for linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx
• Ubuntu update for linux, linux-aws, linux-aws-5.15 and more