Privilege escalation in Linux kernel



Published: 2019-12-12 | Updated: 2020-05-04
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-19768
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 low risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU27503

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2019-19768

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 in the __blk_add_trace() function in kernel/trace/blktrace.c. A local user can run a specially crafted program, trigger a use-after-free error and execute arbitrary code on the system with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 4.18 - 5.5.7

CPE2.3 External links

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.html
http://bugzilla.kernel.org/show_bug.cgi?id=205711
http://security.netapp.com/advisory/ntap-20200103-0001/
http://usn.ubuntu.com/4344-1/

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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