CVE-2021-3347
Public on 2021-01-29
Modified on 2024-03-01
Description
A flaw was found in the Linux kernel. A use-after-free memory flaw in the Fast Userspace Mutexes functionality allowing a local user to crash the system or escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Severity
Important
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | kernel | 2021-02-16 | ALAS-2021-1480 | Fixed |
| Amazon Linux 2 - Kernel-5.10 Extra | kernel | Not Affected | ||
| Amazon Linux 2 - Kernel-5.15 Extra | kernel | Not Affected | ||
| Amazon Linux 2 - Core | kernel | 2021-02-17 | ALAS2-2021-1600 | Fixed |
| Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2022-01-20 | ALAS2KERNEL-5.4-2022-020 | Fixed |
| Amazon Linux 2023 | kernel | Not Affected | ||
| Amazon Linux 2 - Livepatch Extra | kernel-livepatch-4.14.209-160.335 | 2021-02-22 | ALAS2LIVEPATCH-2021-040 | Fixed |
| Amazon Linux 2 - Livepatch Extra | kernel-livepatch-4.14.209-160.339 | 2021-02-22 | ALAS2LIVEPATCH-2021-039 | Fixed |
| Amazon Linux 2 - Livepatch Extra | kernel-livepatch-4.14.214-160.339 | 2021-02-22 | ALAS2LIVEPATCH-2021-041 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | CVSSv2 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
| NVD | CVSSv3 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |