Vulnerability identifier: #VU28160

Vulnerability risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12652

CWE-ID: CWE-362

Exploitation vector: Network

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 race condition in the "__mptctl_ioctl" function in "drivers/message/fusion/mptctl.c" file. A local administrator can hold an incorrect lock during the ioctl operation, trigger the race and gain unauthorized access to sensitive information and escalate privileges on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.4 - 5.4.13

---

External links
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.14
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=28d76df18f0ad5bcf5fa48510b225f0ed262a99b
http://github.com/torvalds/linux/commit/28d76df18f0ad5bcf5fa48510b225f0ed262a99b

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.