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CVE-2021-28964

Public on 2021-03-22
Modified on 2021-07-15
Description

A race condition flaw was found in get_old_root in fs/btrfs/ctree.c in the Linux kernel in btrfs file-system. This flaw allows a local attacker with a special user privilege to cause a denial of service due to not locking an extent buffer before a cloning operation. The highest threat from this vulnerability is to system availability.

Severity
Medium
See what this means
CVSS v3 Base Score
4.1
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2021-05-20 21:12 ALAS-2021-1503
Amazon Linux 2 - Core kernel 2021-04-20 17:55 ALAS2-2021-1627
Amazon Linux 2 - Kernel-5.4 Extra kernel 2022-01-11 23:55 ALAS2KERNEL-5.4-2022-002

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.1 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD CVSSv2 1.9 AV:L/AC:M/Au:N/C:N/I:N/A:P
NVD CVSSv3 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H