CVE-2024-49981 Information

Description

In the Linux kernel the following vulnerability has been resolved:

media: venus: fix use after free bug in venus_remove due to race condition

in venus_probe core->work is bound with venus_sys_error_handler which is used to handle error. The code use core->sys_err_done to make sync work. The core->work is started in venus_event_notify.

If we call venus_remove there might be an unfished work. The possible sequence is as follows:

CPU0 CPU1

                 |venus_sys_error_handler

venus_remove | hfi_destroy | venus_hfi_destroy | kfree(hdev); | |hfi_reinit |venus_hfi_queues_reinit |//use hdev

Fix it by canceling the work in venus_remove.

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://git.kernel.org/stable/c/60b6968341a6dd5353554f3e72db554693a128a5 https://git.kernel.org/stable/c/bf6be32e2d39f6301ff1831e249d32a8744ab28a https://git.kernel.org/stable/c/2a541fcc0bd2b05a458e9613376df1289ec11621 https://git.kernel.org/stable/c/b0686aedc5f1343442d044bd64eeac7e7a391f4e https://git.kernel.org/stable/c/d925e9f7fb5a2dbefd1a73fc01061f38c7becd4c https://git.kernel.org/stable/c/10941d4f99a5a34999121b314afcd9c0a1c14f15 https://git.kernel.org/stable/c/c5a85ed88e043474161bbfe54002c89c1cb50ee2

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.0