Out-of-bounds read in Linux kernel - CVE-2026-98597

Vulnerability identifier: #VU156901

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98597

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 disclose kernel memory or cause a denial of service.

The vulnerability exists due to incorrect receive-length validation in the Linux kernel's sr9700_rx_fixup() function when processing receive buffers. A local user can supply receive data with an inconsistent reported packet length to cause a copy to read beyond the receive buffer, because the length check does not account for the three-byte header and four-byte Ethernet CRC.

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/05b442709bd5256c6c0e11fe56b9a0cb2455c245
• https://git.kernel.org/stable/c/6ab6c9d120b30c94579192ef83a581a3dda6d79c
• https://git.kernel.org/stable/c/8488779d9bddbdb33588c9fc2c0657a3da773f61
• https://git.kernel.org/stable/c/92d88c88390fc62444c00a1a22078f838e03891f
• https://git.kernel.org/stable/c/9b59b00890c5dea355b4cc8795ab8eeafc044e48
• https://git.kernel.org/stable/c/baf07d5153d3af8f98e65e2d3566bc0d50c4e3ac
• https://git.kernel.org/stable/c/c06bde80ae7a7b595732f7cabcb92cf08db9d56a
• https://git.kernel.org/stable/c/e1f5b74edccf4c9b671b6bce4435a98746fe5167

• Out-of-bounds read in Linux kernel net usb 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