CVE-2026-53192
Description
A flaw was found in the Linux kernel's Advanced Linux Sound Architecture (ALSA) timer component. A race condition can occur during the release of a timer object, specifically when the SNDRV_TIMER_IOCTL_PARAMS ioctl is called concurrently. This can lead to a use-after-free vulnerability, potentially allowing a local attacker to achieve arbitrary code execution or cause a denial of service.
Statement
This vulnerability is rated as Moderate because it requires local access and precise timing during concurrent operations, preventing remote exploitation. In standard Red Hat Enterprise Linux server deployments, audio subsystem interfaces are rarely utilized by server workloads, which significantly restricts real-world exposure. Local authenticated users could potentially leverage this race condition to induce a system crash or escalate privileges, but the necessity of specific ioctl timing reduces overall exploit reliability.
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 | 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 | High | N/A | High |
| Integrity Impact | High | 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:H/I:H/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)
Integrity,Confidentiality,Availability
Technical Impact: Modify Application Data; Modify Memory; DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands
Attackers may be able to exploit a signal handler race condition to cause the product state to be corrupted. It may be possible to execute arbitrary code by modifying global variables or data structures at unexpected times, violating the assumptions of code that uses this global data.
Access Control
Technical Impact: Gain Privileges or Assume Identity
If a signal handler interrupts code that is executing with privileges, it may be possible that the signal handler will also be executed with elevated privileges, possibly making subsequent exploits more severe.
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