CVE-2020-10255
Description
A Rowhammer flaw was found in latest DDR4 DRAM hardware chips. These chips implement Target Row Refresh (TRR) mitigation to prevent a Rowhammer flaw-induced bit corruption across memory space. An unprivileged system user may leverage this flaw and use Rowhammer attack variants to induce bit corruptions across memory space, potentially resulting in a denial of service or privileges escalation scenarios. The highest threat from this vulnerability is to system availability.
Statement
This hardware issue cannot be fixed via usual software updates. For additional information, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/articles/1377393.
Mitigation
Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.5 | 9 | N/A |
| Attack Vector | Adjacent Network | Network | N/A |
| Attack Complexity | High | High | N/A |
| Privileges Required | Low | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Changed | Changed | N/A |
| Confidentiality | None | High | N/A |
| Integrity Impact | Low | High | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H
NVD: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Understanding the Weakness (CWE)
Other
Technical Impact: Quality Degradation; Varies by Context
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