CVE-2023-54170
Description
A race condition was found in the Linux kernel's keyring subsystem. When concurrent DNS queries resolve the same hostname, a duplicate index key can be created in the keyring's assoc_array. The assoc_array implementation has a BUG_ON() check that detects this invalid state, causing a kernel crash. This is particularly triggered during CIFS server name resolution.
Statement
This flaw can occur during normal system operation when multiple concurrent DNS resolutions happen for the same hostname. Systems using CIFS/SMB mounts with hostname-based server specifications are more susceptible. The race window is small but the impact is a kernel crash when triggered.
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 | 5.5 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Integrity,Confidentiality,Other
Technical Impact: Modify Application Data; Read Application Data; Alter Execution Logic
Frequently Asked Questions
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