CVE-2021-26318
AMD CPU PREFETCH Information Leak Vulnerability
Description
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.
INFO
Published Date :
Oct. 13, 2021, 7:15 p.m.
Last Modified :
Oct. 20, 2021, 6:29 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.0
Public PoC/Exploit Available at Github
CVE-2021-26318 has a 2 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-26318
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-26318.
| URL | Resource |
|---|---|
| https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017 | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Kernel Address Space Layout Derandomization (KASLD) - A collection of various techniques to infer the Linux kernel base virtual address as an unprivileged local user, for the purpose of bypassing Kernel Address Space Layout Randomization (KASLR).
kaslr linux linux-kernel linux-kaslr kernel-exploit kernel
C Shell Makefile
scripts
Shell Python Ruby
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-26318 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-26318 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Oct. 20, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017 No Types Assigned https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017 Vendor Advisory Added CWE NIST CWE-203 Added CPE Configuration AND OR *cpe:2.3:o:amd:athlon_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:athlon:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:athlon_pro_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:athlon_pro:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:epyc_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:epyc:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:amd:ryzen_pro_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:amd:ryzen_pro:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-26318 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-26318
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.10248
percentile