CVE-2021-28038
Public on 2021-03-05
Modified on 2021-03-19
Description
An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | kernel | 2021-03-18 | ALAS-2021-1487 | Fixed |
| Amazon Linux 2 - Core | kernel | 2021-03-18 | ALAS2-2021-1616 | Fixed |
| Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2022-01-11 | ALAS2KERNEL-5.4-2022-001 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv2 | 4.9 | AV:L/AC:L/Au:N/C:N/I:N/A:C |
| Amazon Linux | CVSSv3 | 6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| NVD | CVSSv2 | 4.9 | AV:L/AC:L/Au:N/C:N/I:N/A:C |
| NVD | CVSSv3 | 6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |