In the Linux kernel, a vulnerability has been resolved related to the ASoC: soc-compress functionality. This vulnerability allows kernel panic to occur if "panic_on_warn" is set and a compress stream (DPCM) is started without the appropriate mutex being held. When this situation arises, specific functions such as "snd_soc_dpcm_mutex_assert_held" issue warnings, indicating that the mutex is not held properly, leading to a critical failure in the system.
The vulnerability was categorized with an unknown severity level. However, the potential for a kernel panic poses a significant risk, especially in environments where stability is crucial. Organizations utilizing affected kernel versions should prioritize assessing their systems for this issue.
As of now, there are no known exploits or public proof of concepts available for this vulnerability, which indicates a lower immediate threat level. Nonetheless, organizations should remain vigilant and monitor their systems for any anomalies that could suggest exploitation attempts.
Organizations should address this vulnerability in their patch management cycle. It is advisable to review kernel updates and apply necessary patches to prevent potential disruptions caused by this vulnerability.
Organizations should prioritize patching immediately.
Vulnerability Details
The vulnerability identified as CVE-2023-53866 affects the Linux kernel, specifically within the ASoC: soc-compress subsystem. The issue arises when panic_on_warn is set, and a compress stream is initiated without the appropriate pcm_mutex being held. This improper handling can lead to a kernel panic, disrupting system operations.
The official description of the vulnerability notes that the panic occurs due to calls made in certain functions without the mutex locking that is necessary to maintain stability. The functions involved include dpcm_be_connect, dpcm_be_disconnect, snd_soc_runtime_action, and dpcm_dapm_stream_event. The failure to assert that the mutex is held leads to a weak point where a kernel panic can be triggered.
Given that the CVSS score is currently unknown, the impact assessment relies heavily on operational context. The urgency for organizations to remediate this vulnerability is moderate, as the exploitability remains low but could become more critical depending on environmental factors.
Technical Analysis
The root cause of CVE-2023-53866 lies in the improper management of mutexes within the Linux kernel's audio subsystem. The lack of mutex locking during the execution of specific audio functions creates a race condition that can lead to a kernel panic, especially if panic_on_warn is enabled.
The attack vector for this vulnerability is local, as it requires access to the kernel to trigger the panic. The complexity of exploiting this vulnerability is categorized as low, given that it involves invoking specific audio functions without the proper mutex lock.
No user interaction is required to trigger this vulnerability, as it is a direct consequence of programming logic within the kernel. The impacts of this vulnerability include potential loss of availability due to the kernel panic, which halts all operations within the affected system.
Risk & Impact Analysis
The deployment risk associated with CVE-2023-53866 is significant due to the potential for kernel panic, which can render systems unusable. Organizations running systems that rely on audio functionality may experience critical failures, leading to downtime and affecting service delivery.
The blast radius potential is substantial, as a kernel panic can impact not just the affected application but the entire operating system, leading to possible data loss or corruption. Given the current lack of known exploits, the urgency for action is moderate, but it should not be underestimated as the vulnerability could attract attention if it remains unaddressed.
Organizations should address this vulnerability in their patch management cycle. It is advisable to review kernel updates and apply necessary patches to prevent potential disruptions caused by this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
As per the current information, the affected versions of the Linux kernel have not been specified. Organizations should consider all versions prior to the vendor patch, as a precautionary measure.
Mitigation & Remediation
Organizations should prioritize patching immediately. It is recommended to monitor official sources for updates and patches related to this vulnerability. If a patch is not available, implementing workarounds that involve ensuring proper mutex handling could help mitigate the risk.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor system logs for any instances of kernel panics or unusual behavior related to audio streams. Additionally, keeping an eye on the performance metrics of the audio subsystem may reveal anomalies indicative of this vulnerability being triggered.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-53866 lies in its representation of broader issues within kernel security and the importance of proper resource management. This vulnerability highlights the critical nature of mutex locking mechanisms in preventing system failures, which is a lesson for security teams to emphasize during development and review processes.
Organizations should apply insights from this incident to strengthen their development practices and ensure that proper defensive coding standards are in place. Moreover, the low EPS score indicates that while the vulnerability is currently not actively exploited, vigilance is necessary to prevent it from becoming a target.
For further details on improving security practices, organizations may consider exploring resources on penetration testing as well as other security assessments.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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