Out-of-bounds read in Linux kernel - CVE-2026-98602

Vulnerability identifier: #VU156908

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98602

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to disclose kernel heap information.

The vulnerability exists due to an out-of-bounds read in Bluetooth BNEP transmit processing when handling AF_PACKET frames shorter than the 14-byte Ethernet header. A local user can submit a specially crafted short frame to cause Ethernet header processing to read beyond the available packet data and disclose kernel heap information.

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/035f9b1809861967e58ce652680d70ea1502058f
• https://git.kernel.org/stable/c/1e7aebc188f889b56c3aaeb6133ef6d77022c887
• https://git.kernel.org/stable/c/3e605ff5932afe0970c2beca66f2f1ba2babe4dd
• https://git.kernel.org/stable/c/667aa703e11cdc237d169393bc6a5ea9acbb33c2
• https://git.kernel.org/stable/c/7af80ad2cebfe2f1879d6a39a1aaa061d9c4e1ca
• https://git.kernel.org/stable/c/8f31031326994d1abfcc6ebb6927ef96e51fb9ff
• https://git.kernel.org/stable/c/ad0d2d4ada51321db787262ef343193c712b76b5
• https://git.kernel.org/stable/c/f0ca020cbb9bb7f3f4ea8ba1dfcf30a282aec91e

• Out-of-bounds read in Linux kernel bluetooth bnep
• 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