Out-of-bounds read in Linux kernel - CVE-2026-98461

Vulnerability identifier: #VU156759

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-2026-98461

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to potentially cause a denial of service by triggering an out-of-bounds read in the kernel.

The vulnerability exists due to an out-of-bounds read in the Bluetooth is_filtered_packet() function when filtering event packets before their lengths are validated. A local user can supply a malformed event through a controller or vhci device to trigger reads beyond an empty event buffer or a truncated command event, 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/1a92763c2ba721bf113cd83f913fe8c511b4a4dc
• https://git.kernel.org/stable/c/2501a3b7b7144d1d11939b355a48ed01f83d0c62
• https://git.kernel.org/stable/c/3976bbcd43b9b94c53ac9b0fd28888011588f4cc
• https://git.kernel.org/stable/c/39e99d85071bca0feeec3164a9437ca1bff297fc
• https://git.kernel.org/stable/c/b0a6cf99afd57a39598b1beca0e86ef5004980de
• https://git.kernel.org/stable/c/dca25c204f71be0556a15177dbe037237ac43e5e
• https://git.kernel.org/stable/c/ebdd49cec380731844ed9df4092a29a014623df4
• https://git.kernel.org/stable/c/f894f6292d5122cd62d30600736b4a0ae79f7770

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