Use-after-free in Linux kernel



Published: 2020-02-06 | Updated: 2020-06-01
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-8649
CWE-ID CWE-416
Exploitation vector Local
Public exploit N/A
Vulnerable software
Subscribe 		Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU28414

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-8649

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local authenticated user to #BASIC_IMPACT#.

There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the vgacon_invert_region function in drivers/video/console/vgacon.c.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.4 - 5.5.19

CPE2.3 External links

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.216
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.216
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.109
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.173
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.9
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.25
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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