NULL pointer dereference in Linux kernel tty serial driver

1) NULL pointer dereference

EUVDB-ID: #VU90556

Risk: Low

CVSSv4.0: 4.3 [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/E:U/U:Clear]

CVE-ID: CVE-2024-26998

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.6 - 6.6.28

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.6:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.6:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.6:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.6:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.6:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.6:rc6:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.6.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.6.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.6.3:*:*:*:*:*:*:*

External links

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

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.