Denial of service in Linux Kernel



Published: 2020-02-04
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-8428
CWE-ID CWE-416
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU24834

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2020-8428

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error within the "may_create_in_sticky" in "fs/namei.c". A local user can cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.0 - 5.4.17


CPE2.3 External links

http://www.openwall.com/lists/oss-security/2020/01/28/4
http://www.openwall.com/lists/oss-security/2020/02/02/1
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6
http://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79f6
http://www.openwall.com/lists/oss-security/2020/01/28/2

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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