In the Linux kernel, a vulnerability has been resolved that pertains to the md/raid10 component. This vulnerability allows for the potential of a soft lockup during write operations due to a lack of limits for plugged bio in raid1/raid10 configurations. While raid1 has a condition to schedule, raid10 does not, leading to the risk of excessive writes and subsequent soft lockups. The issue can be easily triggered using a writeback test for raid10 with ramdisks, as demonstrated by the reported soft lockup incidents.
The severity level of this vulnerability is classified as medium, with a CVSS score of 5.5. The risk to organizations includes potential disruptions in availability, as the soft lockup can lead to system instability during critical write operations. Organizations should prioritize patching immediately to mitigate this risk.
Currently, there are no public exploits confirmed for this vulnerability. However, system administrators should remain vigilant as the potential for local exploitation exists if the issue is not addressed.
Given the nature of the vulnerability and its impacts, organizations utilizing affected versions of the Linux kernel must take immediate action to implement the necessary patches and updates.
Vulnerability Details
The official description of the vulnerability indicates that in the Linux kernel, a flaw has been identified within the md/raid10 implementation. Specifically, the issue stems from the absence of a limit for plugged bio during writes, which can lead to soft lockups if too many writes are executed. This problem is exacerbated by the fact that raid1 includes a condition for scheduling while raid10 does not.
The CVSS score of 5.5 indicates a medium severity level, characterized by a local attack vector, low attack complexity, and low privileges required. The only impact noted is on availability, which is rated as high.
The vulnerability affects the Linux kernel across multiple versions, as detailed in the configurations section. The publication date for the resolution of this issue is September 15, 2025.
Technical Analysis
The root cause of this vulnerability lies in the design of the md/raid10 module in the Linux kernel. When flushing writes, the implementation does not limit the number of plugged bio entries, which can lead to excessive write operations and, subsequently, a soft lockup of the CPU.
The attack vector is local, meaning that an authenticated user with access to the system can trigger the vulnerability. The attack complexity is low, as no special conditions or user interaction are required to exploit the vulnerability.
The privilege required for this vulnerability is low, as users with standard permissions can potentially trigger the soft lockup. The impacts are primarily on availability, as the system may become unresponsive when the soft lockup occurs.
Risk & Impact Analysis
The real-world deployment risk of this vulnerability is significant, especially in environments where the Linux kernel is employed for critical applications. The potential for soft lockups can disrupt normal operations, leading to downtime and loss of productivity.
Organizations should closely assess the blast radius of this vulnerability, particularly in scenarios involving high write workloads. The urgency of addressing this vulnerability is underscored by its CVSS score of 5.5, which indicates a medium severity. Although not classified as high, the implications for availability warrant prompt remediation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects the following versions of the Linux kernel: - All versions prior to 4.14.322 - Versions 4.15 to 4.19.290 - Versions 4.20 to 5.4.250 - Versions 5.5 to 5.10.187 - Versions 5.11 to 5.15.149 - Versions 5.16 to 6.1.82 - Versions 6.2 to 6.4.6
Mitigation & Remediation
Organizations are urged to apply the latest patches for the Linux kernel to mitigate this vulnerability. Updating to a version that includes the fix for this issue is critical. If an immediate patch is not available, consider implementing workarounds to limit write operations or monitor for conditions that could lead to soft lockups.
For further guidance on effective remediation strategies, organizations can refer to penetration testing services that can help identify additional vulnerabilities.
Detection Guidance
System administrators should monitor logs for indicators of soft lockups, such as CPU usage spikes or unresponsive system states. Behavioral anomalies during write operations should also be noted, as these may indicate attempts to exploit the vulnerability.
AppSecure Threat Intelligence Insight
This vulnerability highlights the ongoing challenges in managing the complexities of the Linux kernel. The potential for availability impact emphasizes the need for proactive security measures in kernel management. Security teams should regularly review their patch management policies and consider utilizing vulnerability management programs to stay ahead of emerging threats.
Additionally, the increasing frequency of kernel vulnerabilities necessitates a strategic approach to security testing. Organizations can benefit from engaging in penetration testing methodologies to identify potential weaknesses before they can be exploited.
Ultimately, organizations should adopt a holistic approach to security that encompasses both proactive and reactive measures, ensuring that they are prepared to respond to vulnerabilities such as CVE-2023-53151.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)