SB20240625153 - Use-after-free in Linux kernel dpll driver

Description

This security bulletin contains information about 1 security vulnerability.

1) Use-after-free (CVE-ID: CVE-2024-35836)

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.

Remediation

Install update from vendor's website.

References

• 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