Use-after-free in Linux kernel - CVE-2026-98483

Vulnerability identifier: #VU156783

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-2026-98483

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to potentially cause a denial of service through access to freed kernel memory.

The vulnerability exists due to use-after-free in the Linux kernel NFC functions nfc_llcp_general_bytes() and nfc_get_local_general_bytes() when retrieving local general bytes. Releasing the local object's reference can free the object before callers access the returned pointer. A local user can potentially trigger affected NFC operations that dereference this stale pointer to cause a kernel crash and denial of service.

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/19bcfc2a56d0b82919079b5424c5a9a0ac897dcf
• https://git.kernel.org/stable/c/25bfa673adc70189c0bc872940421ae59f789cf6
• https://git.kernel.org/stable/c/2b31d0cc95856c856ada91f943fb14dfdf29a923
• https://git.kernel.org/stable/c/841af260ff477f6191872bc3b2e15488615c1827
• https://git.kernel.org/stable/c/9ede11e12f965ace97c4e0f606667f24fb41e7e1
• https://git.kernel.org/stable/c/c40f61a6a413f3eaf028e5fe367fd9749e503ab0
• https://git.kernel.org/stable/c/d8c929e9afdbc33b1876ecb97a517e850449b5bd
• https://git.kernel.org/stable/c/dcab71a7011918f6fdba7adcec02d217dcb84b8d

• Use-after-free in Linux kernel nfc
• 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