CVE-2021-26318
Published: 13 October 2021
A timing and power-based side channel attack leveraging the x86 PREFETCH instructions on some AMD CPUs could potentially result in leaked kernel address space information.
Notes
| Author | Note |
|---|---|
| mdeslaur | no details on microcode update as of 2022-01-05 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
amd64-microcode Launchpad, Ubuntu, Debian |
bionic |
Deferred
|
| focal |
Deferred
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Deferred
|
|
| kinetic |
Ignored
(end of life, was deferred)
|
|
| lunar |
Ignored
(end of life, was deferred)
|
|
| mantic |
Deferred
|
|
| noble |
Deferred
|
|
| trusty |
Deferred
|
|
| upstream |
Needs triage
|
|
| xenial |
Deferred
(2022-03-08)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 4.7 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |