NULL pointer dereference in Linux kernel - CVE-2019-12984

Vulnerability identifier: #VU18956

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-12984

CWE-ID: CWE-476

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows an attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the "nfc_genl_deactivate_target()" function in "net/nfc/netlink.c" file. An attacker with physical access to the system can persuade a user to execute an application that omits certain near-field communication (NFC) attributes and perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
linux-kvm (Ubuntu package)
linux-snapdragon (Ubuntu package)
linux-hwe (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure (Ubuntu package)
linux (Ubuntu package)
linux-raspi2 (Ubuntu package)
linux-oem (Ubuntu package)
linux-oracle (Ubuntu package)
linux-gke-4.15 (Ubuntu package)
linux-aws (Ubuntu package)

Install update from vendor's website.

Linux kernel - update to 5.1.13
linux-kvm (Ubuntu package) - addressed in versions 4.15.0-1042.42, 5.0.0-1013.14
linux-snapdragon (Ubuntu package) - addressed in versions 4.15.0-1060.66, 5.0.0-1018.19
linux-hwe (Ubuntu package) - addressed in versions 4.15.0-58.64~16.04.1, 5.0.0-25.26~18.04.1
linux-gcp (Ubuntu package) - addressed in versions 4.15.0-1040.42~16.04.1, 4.15.0-1040.42, 5.0.0-1013.13
linux-azure (Ubuntu package) - addressed in versions 4.15.0-1055.60, 5.0.0-1014.14~18.04.1, 5.0.0-1014.14
linux (Ubuntu package) - addressed in versions 4.15.0-58.64, 5.0.0-25.26
linux-raspi2 (Ubuntu package) - addressed in versions 4.15.0-1043.46, 5.0.0-1014.14
linux-oem (Ubuntu package) - update to 4.15.0-1050.57
linux-oracle (Ubuntu package) - addressed in versions 4.15.0-1021.23~16.04.1, 4.15.0-1021.23
linux-gke-4.15 (Ubuntu package) - update to 4.15.0-1040.42
linux-aws (Ubuntu package) - update to 5.0.0-1014.16

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.13
• https://github.com/torvalds/linux/commit/385097a3675749cbc9e97c085c0e5dfe4269ca51

• Denial of service in Linux Kernel NFC implementation
• Ubuntu update for linux, linux-azure, linux-gcp and more
• Ubuntu update for linux, linux-azure, linux-gcp and more
• Ubuntu update for linux-aws