CVE-2023-54308
Description
A flaw was found in the Linux kernel's ALSA ymfpci sound driver. During a previous refactoring commit that removed snd_card_ymfpci_remove(), the snd_card_new() call was not updated to snd_devm_card_new(). This omission means snd_card_free() is never called during module unload, leading to a kernel oops when userspace attempts to access the sound device after module removal.
Statement
This affects systems with Yamaha YMF724/740/744/754 PCI sound cards using the ymfpci driver. The crash occurs only after the module is unloaded and a subsequent access attempt is made to the sound device. Standard system operation without module unloading is unaffected, limiting the impact to administrative driver management scenarios.
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 | 4.7 | N/A | 7.8 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | High | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | High |
| Integrity Impact | None | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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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