VDB
CVE-2021-26318
CVE-2021-26318
REJECTED
CVSS 4.699999809265137 MEDIUM
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.
EPSS 0.33% · 25.6th percentile
Risk Scores
CVSS 3.1
4.699999809265137
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS Score
0.33%
25.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:14.04:LTS | amd64-microcode | 3.20180524.1~ubuntu0.14.04.1, 0, 2.20131007.1+really20130710.1 |
| Ubuntu:20.04:LTS | amd64-microcode | 3.20191021.1ubuntu1, 3.20181128.1ubuntu2, 0 |
| Ubuntu:25.10 | amd64-microcode | *, 0, 3.20250708.1ubuntu1 |
| Ubuntu:22.04:LTS | amd64-microcode | *, 3.20191218.1ubuntu2.2, 3.20191218.1ubuntu2.3 |
| Ubuntu:Pro:16.04:LTS | amd64-microcode | 3.20191021.1ubuntu0.16.04.1, 3.20180524.1~ubuntu0.16.04.1, 2.20160316.1 |
| Ubuntu:24.04:LTS | amd64-microcode | 0, 3.20230808.1.1ubuntu1, 3.20250311.1ubuntu0.24.04.1 |
| Ubuntu:Pro:18.04:LTS | amd64-microcode | 3.20191021.1+really3.20181128.1~ubuntu0.18.04.1, 3.20180524.1~ubuntu0.18.04.2, 3.20180524.1~ubuntu0.18.04.1 |
Timeline
- Oct 13, 2021 CVE Published
- Oct 14, 2021 EPSS Score
- Dec 10, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 29, 2022 EPSS Score
- Jul 25, 2022 EPSS Score
- Sep 20, 2022 EPSS Score
- Nov 16, 2022 EPSS Score
- Jan 12, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-26318 third-party-advisory
- https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-26318 third-party-advisory