Out-of-bounds read in Linux kernel - CVE-2026-98892

Vulnerability identifier: #VU157610

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2026-98892

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to trigger an out-of-bounds read that may cause a denial of service.

The vulnerability exists due to insufficient payload-length validation in the Linux kernel ARM SCMI BASE_ERROR_EVENT notification parser when processing variable-length message reports. A local user can supply a truncated notification payload whose error_status specifies more reports than the payload contains to trigger reads beyond the received data, potentially causing a kernel crash.

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/28d65a0a46435d48b96b6943c518095dff1602a1
• https://git.kernel.org/stable/c/4a754704698017ced0b657c92b468035faad00ed
• https://git.kernel.org/stable/c/56e7e64cdd0e7209a58c8ec66028d63387402919
• https://git.kernel.org/stable/c/890a9c3bf9dae90dcabded9d8e10c708a13779f7
• https://git.kernel.org/stable/c/bd8bc95ef2daa3bac56197cffcbf2d4c5ed42216
• https://git.kernel.org/stable/c/c0742f23ec13fb6f5e0cd884323467a6c127d3c2
• https://git.kernel.org/stable/c/cb77a50d1114c0c9e084176301a8e094d383edfa

• Out-of-bounds read in Linux kernel firmware arm_scmi 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