Use-after-free in Linux kernel



Published: 2019-11-29 | Updated: 2020-06-01
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-19377
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: #VU28418

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2019-19377

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to execute arbitrary code.

In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and unmounting can lead to a use-after-free in btrfs_queue_work in fs/btrfs/async-thread.c.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.4 - 5.6.4

CPE2.3 External links

http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.33
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.18
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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