#VU97261 NULL pointer dereference in Linux kernel - CVE-2024-46691

Vulnerability identifier: #VU97261

Vulnerability 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-2024-46691

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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 pmic_glink_ucsi_notify(), pmic_glink_ucsi_callback() and pmic_glink_ucsi_probe() functions in drivers/usb/typec/ucsi/ucsi_glink.c, within the EXPORT_SYMBOL_GPL() function in drivers/soc/qcom/pmic_glink.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.10, 6.10.1, 6.10.2, 6.10.3, 6.10.4, 6.10.5, 6.10.6, 6.10.7

---

External links
https://git.kernel.org/stable/c/095b0001aefddcd9361097c971b7debc84e72714
https://git.kernel.org/stable/c/11bb2ffb679399f99041540cf662409905179e3a
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.10.8
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.11

---

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.