Vulnerability identifier: #VU28167

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2020-12657

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 compromise vulnerable system.

The vulnerability exists due to a use-after-free error in "block/bfq-iosched.c" file related to "bfq_idle_slice_timer_body". A local user can execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.6 - 5.6.4

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CPE

• cpe:2.3:o:linux_foundation:linux_kernel:5.6.1:*:*:*:*:*:*:*

External links
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9
http://github.com/torvalds/linux/commit/2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9
http://patchwork.kernel.org/patch/11447049/

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?