In the Linux kernel, a medium-severity vulnerability has been resolved regarding the handling of interrupts in the amdgpu driver. The vulnerability exists due to the improper usage of the amdgpu_irq_put function, leading to potential issues during hardware initialization and suspension. This vulnerability allows for a high availability impact, which can disrupt system operations.
The CVSS score for this vulnerability is 5.5, indicating a medium severity level. Organizations utilizing affected Linux kernel versions should be aware of the risks, as the vulnerability can be exploited locally to affect system availability.
Risk to organizations includes potential service disruptions and degraded system performance if left unpatched. Organizations should prioritize patching immediately to mitigate these risks.
The vulnerability is currently not known to have any public exploits or proof-of-concept code available. However, organizations should take this vulnerability seriously and apply the necessary patches as they become available.
Vulnerability Details
The vulnerability is classified within the Linux kernel, specifically in the amdgpu driver. The root cause is related to the handling of the gmc.ecc_irq interrupt, which is controlled by firmware settings. The improper use of the amdgpu_irq_put function leads to unnecessary call traces during hardware initialization.
The vulnerability has a CVSS score of 5.5, indicating medium severity. The attack vector is local, with low complexity and low privileges required. There is no user interaction necessary for exploitation.
The affected product is the Linux kernel, with specific versions being vulnerable, including versions from 6.1.26 to 6.1.29, 6.2.13 to 6.2.16, and 6.3.1 to 6.3.3. The vulnerability was published on September 15, 2025.
Technical Analysis
The root cause of this vulnerability lies in the amdgpu driver's handling of the gmc.ecc_irq interrupt. The firmware enables this interrupt based on internal settings, and the host driver lacks the necessary privileges to modify its state. This situation renders the usage of the amdgpu_irq_put function meaningless, as it leads to call traces that clutter the logs without providing actionable information.
This vulnerability is localized, meaning it requires local access to exploit. The complexity is low; an attacker with local access can trigger the vulnerability without the need for user interaction. The impact on availability is rated as high, as it can lead to system outages.
No confidentiality or integrity impact has been identified, making the primary concern the availability of the affected systems.
Risk & Impact Analysis
The risk to organizations includes potential service disruptions and degraded system performance. Given that the availability impact is high, organizations may experience significant operational difficulties if the vulnerability is exploited.
Organizations should address this vulnerability in their priority patch cycle. The medium CVSS score suggests that while immediate exploitation may not be possible, the risk of future exploitation remains.
The urgency for remediation is moderate, and organizations should schedule patching efforts to ensure that affected systems are updated promptly.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The specific versions of the Linux kernel affected by this vulnerability include versions from 6.1.26 to 6.1.29, 6.2.13 to 6.2.16, and 6.3.1 to 6.3.3. Organizations should ensure they are using the updated versions to mitigate risks.
Mitigation & Remediation
Organizations should prioritize patching their Linux kernel installations. The recommended action is to upgrade to the latest available version that resolves this vulnerability. For those unable to apply the patch immediately, consider implementing configuration hardening and monitoring for unusual system behavior.
For further details on effective security measures, organizations can refer to our guide on Linux kernel security.
Detection Guidance
Organizations should monitor system logs for any unusual call traces related to the amdgpu driver. Additionally, be vigilant for any signs of service disruptions that could indicate an exploitation attempt.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability highlights the importance of robust kernel security practices. The pattern observed in this incident serves as a reminder for organizations to regularly update their systems and review their configurations.
Security teams should learn from this vulnerability and implement proactive monitoring and incident response strategies. For more insights into securing Linux environments, organizations can explore our resources on Linux kernel security and other related topics.
In conclusion, the proactive management of vulnerabilities such as CVE-2023-53237 is crucial for maintaining system integrity and availability.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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