CVE-2020-8428

HIGH

Linux kernel <5.5 - Use After Free

Title source: llm
STIX 2.1

Description

fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free, which allows local users to cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory, aka CID-d0cb50185ae9. One attack vector may be an open system call for a UNIX domain socket, if the socket is being moved to a new parent directory and its old parent directory is being removed.

References (16)

Core 16
Core References
Mailing List, Third Party Advisory x_refsource_misc
https://www.openwall.com/lists/oss-security/2020/01/28/2
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2020/01/28/4
Vendor Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20200313-0003/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4320-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4318-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4324-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4325-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4319-1/
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2020/dsa-4667
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2020/dsa-4698
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2020/02/02/1
Mailing List mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html

Scores

CVSS v3 7.1
EPSS 0.0009
EPSS Percentile 25.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Details

CWE
CWE-416
Status published
Products (1)
linux/linux_kernel 4.19 - 5.5
Published Jan 29, 2020
Tracked Since Feb 18, 2026