NULL pointer dereference in Linux kernel - CVE-2024-26998

Vulnerability identifier: #VU90556

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-2024-26998

CWE-ID: CWE-476

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the uart_tty_port_shutdown() function in drivers/tty/serial/serial_core.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
linux-image-kvm (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic-hwe-24.04 (Ubuntu package)
linux-image-generic-64k-hwe-24.04 (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-6.8.0-38-generic (Ubuntu package)
linux-image-6.8.0-38-generic-64k (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-virtual-hwe-24.04 (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-6.8.0-38-lowlatency-64k (Ubuntu package)
linux-image-6.8.0-38-lowlatency (Ubuntu package)
linux-image-6.8.0-1006-gke (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-6.8.0-1007-raspi (Ubuntu package)
linux-image-6.8.0-1007-intel (Ubuntu package)
linux-image-6.8.0-1008-oracle (Ubuntu package)
linux-image-6.8.0-1008-oracle-64k (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-oem-24.04a (Ubuntu package)
linux-image-oem-24.04 (Ubuntu package)
linux-image-oracle-64k (Ubuntu package)
linux-image-ibm-classic (Ubuntu package)
linux-image-6.8.0-1008-ibm (Ubuntu package)
linux-image-6.8.0-1008-oem (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-ibm-lts-24.04 (Ubuntu package)
linux-image-6.8.0-1009-nvidia (Ubuntu package)
linux-image-6.8.0-1009-nvidia-64k (Ubuntu package)
linux-image-nvidia (Ubuntu package)
linux-image-nvidia-64k (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-6.8.0-1010-azure-fde (Ubuntu package)
linux-image-6.8.0-1010-azure (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-6.8.0-1010-gcp (Ubuntu package)
linux-image-6.8.0-1011-aws (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-intel (Ubuntu package)

Install update from vendor's website.

Linux kernel - update to 6.6.29
linux-image-kvm (Ubuntu package) - update to 6.8.0-38.38
linux-image-generic-lpae (Ubuntu package) - update to 6.8.0-38.38
linux-image-generic-hwe-24.04 (Ubuntu package) - update to 6.8.0-38.38
linux-image-generic-64k-hwe-24.04 (Ubuntu package) - update to 6.8.0-38.38
linux-image-generic-64k (Ubuntu package) - update to 6.8.0-38.38
linux-image-6.8.0-38-generic (Ubuntu package) - update to 6.8.0-38.38
linux-image-6.8.0-38-generic-64k (Ubuntu package) - update to 6.8.0-38.38
linux-image-generic (Ubuntu package) - update to 6.8.0-38.38
linux-image-virtual (Ubuntu package) - update to 6.8.0-38.38
linux-image-virtual-hwe-24.04 (Ubuntu package) - update to 6.8.0-38.38
linux-image-lowlatency-64k (Ubuntu package) - update to 6.8.0-38.38.1
linux-image-lowlatency (Ubuntu package) - update to 6.8.0-38.38.1
linux-image-6.8.0-38-lowlatency-64k (Ubuntu package) - update to 6.8.0-38.38.1
linux-image-6.8.0-38-lowlatency (Ubuntu package) - update to 6.8.0-38.38.1
linux-image-6.8.0-1006-gke (Ubuntu package) - update to 6.8.0-1006.9
linux-image-gke (Ubuntu package) - update to 6.8.0-1006.9
linux-image-raspi (Ubuntu package) - update to 6.8.0-1007.7
linux-image-6.8.0-1007-raspi (Ubuntu package) - update to 6.8.0-1007.7
linux-image-intel (Ubuntu package) - update to 6.8.0-1007.14
linux-image-6.8.0-1007-intel (Ubuntu package) - update to 6.8.0-1007.14
linux-image-6.8.0-1008-oracle (Ubuntu package) - update to 6.8.0-1008.8
linux-image-6.8.0-1008-oracle-64k (Ubuntu package) - update to 6.8.0-1008.8
linux-image-oracle (Ubuntu package) - update to 6.8.0-1008.8
linux-image-oem-24.04a (Ubuntu package) - update to 6.8.0-1008.8
linux-image-oem-24.04 (Ubuntu package) - update to 6.8.0-1008.8
linux-image-oracle-64k (Ubuntu package) - update to 6.8.0-1008.8
linux-image-ibm-classic (Ubuntu package) - update to 6.8.0-1008.8
linux-image-6.8.0-1008-ibm (Ubuntu package) - update to 6.8.0-1008.8
linux-image-6.8.0-1008-oem (Ubuntu package) - update to 6.8.0-1008.8
linux-image-ibm (Ubuntu package) - update to 6.8.0-1008.8
linux-image-ibm-lts-24.04 (Ubuntu package) - update to 6.8.0-1008.8
linux-image-6.8.0-1009-nvidia (Ubuntu package) - update to 6.8.0-1009.9
linux-image-6.8.0-1009-nvidia-64k (Ubuntu package) - update to 6.8.0-1009.9
linux-image-nvidia (Ubuntu package) - update to 6.8.0-1009.9
linux-image-nvidia-64k (Ubuntu package) - update to 6.8.0-1009.9
linux-image-azure-fde (Ubuntu package) - update to 6.8.0-1010.10
linux-image-azure (Ubuntu package) - update to 6.8.0-1010.10
linux-image-6.8.0-1010-azure-fde (Ubuntu package) - update to 6.8.0-1010.10
linux-image-6.8.0-1010-azure (Ubuntu package) - update to 6.8.0-1010.10
linux-image-gcp (Ubuntu package) - update to 6.8.0-1010.11
linux-image-6.8.0-1010-gcp (Ubuntu package) - update to 6.8.0-1010.11
linux-image-6.8.0-1011-aws (Ubuntu package) - update to 6.8.0-1011.12
linux-image-aws (Ubuntu package) - update to 6.8.0-1011.12

• https://git.kernel.org/stable/c/7ae7104d54342433a3a73975f6569beefdd86350
• https://git.kernel.org/stable/c/bb1118905e875c111d7ccef9aee86ac5e4e7f985
• https://git.kernel.org/stable/c/9cf7ea2eeb745213dc2a04103e426b960e807940
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.29

• NULL pointer dereference in Linux kernel tty serial driver
• Ubuntu update for linux
• Ubuntu update for linux-gke
• Ubuntu update for linux-aws
• Ubuntu update for linux-oracle