CVE-2022-33743
Description
An incomplete cleanup flaw was found in the Linux kernel’s Xen networking XDP (eXpress Data Path) subsystem. This flaw allows a local user to crash the system.
Statement
Keeping this flaw Moderate, because only a denial of service is possible (A:H) as result of memory leak problem. The memory leak can happen because instead of removing skb, keeping it in the networking stack forever. The CVSS score is higher, than usually for Moderate, because kept "C:H" and "I:H" too in case maybe potentially would be possible privilege escalation too.
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).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.8 | 7.8 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Red Hat CVSS v3 Score Explanation
Only a denial of service is possible (A:H) because this is a memory leak problem. The memory leak can happen because instead of removing skb, keeping it in the networking stack forever. However, anyway keeping "C:H" and "I:H" too, because privilege escalation cannot be ruled out, and both keeping this flaw Moderate.
Understanding the Weakness (CWE)
Other,Confidentiality,Integrity
Technical Impact: Other; Read Application Data; Modify Application Data; DoS: Resource Consumption (Other)
It is possible to overflow the number of temporary files because directories typically have limits on the number of files allowed. This could create a denial of service problem.
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