Infinite loop in Linux kernel - CVE-2026-98494

Vulnerability identifier: #VU156794

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-2026-98494

CWE-ID: CWE-835

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service through a soft lockup.

The vulnerability exists due to an unreachable loop exit condition in the Linux kernel atl1 driver's atl1_intr_tx() function when hardware reports an out-of-range transmit descriptor consumer index during a PCIe link or MAC reset. A local user can potentially induce an infinite transmit cleanup loop to cause a denial of service if able to trigger this hardware condition.

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/0f573b0576252d44fb27ab8470ea873bc6408ef3
• https://git.kernel.org/stable/c/43e746821f5f5afbbf68e388bf9fbe221e03bfca
• https://git.kernel.org/stable/c/5d7ac337d37cb97d77e4c910d37746694b606661
• https://git.kernel.org/stable/c/6285919d4c06254d257d24dc980f6332e1984a82
• https://git.kernel.org/stable/c/632cd7b81cb7bab36112f02eb2ee7f7cc1214fb1
• https://git.kernel.org/stable/c/6ab9f61ca851f02ae4398cebaf00735a22e1d6ca
• https://git.kernel.org/stable/c/79e2447b11322c27ef9ac423be0a94efc7691f02
• https://git.kernel.org/stable/c/c55e51d5899e80f9593b26985ed0b89e0c828a5e

• Infinite loop in Linux kernel atheros atlx driver
• 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