Use-after-free in Linux kernel dma idxd driver

1) Use-after-free

EUVDB-ID: #VU93070

Risk: Low

CVSSv3.1: 7.7 [AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-38629

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

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 idxd_wq_del_cdev() function in drivers/dma/idxd/cdev.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/9eb15f24a0b9b017b39cde8b8c07243676b63687
http://git.kernel.org/stable/c/15edb906211bf53e7b5574f7326ab734d6bff4f9
http://git.kernel.org/stable/c/76e43fa6a456787bad31b8d0daeabda27351a480

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.