#VU24834 Use-after-free in Linux kernel - CVE-2020-8428
Published: February 3, 2020 / Updated: May 26, 2021
Vulnerability identifier: #VU24834
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2020-8428
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
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.
Remediation
Install updates from vendor's website.
External links
- http://www.openwall.com/lists/oss-security/2020/01/28/4
- http://www.openwall.com/lists/oss-security/2020/02/02/1
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6
- https://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79f6
- https://www.openwall.com/lists/oss-security/2020/01/28/2