NULL pointer dereference in Linux kernel thunderbolt driver

1) NULL pointer dereference

EUVDB-ID: #VU90525

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-2024-27060

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 tb_port_update_credits() function in drivers/thunderbolt/switch.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 - 6.8 rc5

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/ce64ba1f6ec3439e4b4d880b4db99673f4507228
https://git.kernel.org/stable/c/d3d17e23d1a0d1f959b4fa55b35f1802d9c584fa
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.54
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7.12
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8

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.