#VU93349 Use-after-free in Linux kernel - CVE-2024-35836

Vulnerability identifier: #VU93349

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-35836

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the dpll_msg_add_pin_freq(), dpll_pin_is_freq_supported(), dpll_cmd_pin_get_one(), dpll_pin_on_pin_state_set(), dpll_pin_state_set(), dpll_pin_prio_set(), dpll_pin_direction_set(), dpll_pin_phase_adj_set() and dpll_pin_find() functions in drivers/dpll/dpll_netlink.c, within the dpll_device_unregister(), dpll_pin_alloc(), dpll_pin_put() and dpll_pin_on_pin_register() functions in drivers/dpll/dpll_core.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.7, 6.7 rc1, 6.7 rc2, 6.7 rc3, 6.7 rc5, 6.7 rc6, 6.7 rc7, 6.7.1, 6.7.2, 6.8 rc1, 6.8 rc2, 6.8 rc5

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External links
https://git.kernel.org/stable/c/5050a5b9d8b4d3c6f7e376e07670e437db7ccf9c
https://git.kernel.org/stable/c/830ead5fb0c5855ce4d70ba2ed4a673b5f1e7d9b
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7.3
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8

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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.