Critical Vulnerability in Linux Kernel: Memory Allocation Issue in SCSI Libiscsi
Summary
CVE-2025-38700: In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi: Initialize iscsi_conn->dd_data only if memory is allocated In case of an ib_fast_reg_mr allocation failure during iSER setup, the machin... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is a core component of the operating system that manages hardware and system resources. It provides essential services for all other parts of the operating system and is crucial for system stability and performance. The kernel is responsible for managing memory, processes, and device drivers. This vulnerability affects multiple Debian versions of the Linux kernel, specifically related to the SCSI libiscsi subsystem, which is responsible for managing SCSI connections over iSCSI.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the SCSI libiscsi subsystem where the 'iscsi_conn->dd_data' is initialized unconditionally, even when memory allocation fails. This can lead to a system panic due to an invalid pointer dereference during connection teardown. The panic occurs when an ib_fast_reg_mr allocation fails, causing the kernel to attempt to access unallocated memory, resulting in a crash. The vulnerability is present in Debian versions 11, 12, and 13, with specific fixed versions available for Debian 13 and 14.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the available patches as soon as they are released.
Conclusion
The CVE-2025-38700 vulnerability in the Linux kernel poses a significant risk to systems running affected Debian versions. It is essential to apply the necessary patches to ensure system stability and security. Regular monitoring and updates are crucial to mitigate such vulnerabilities effectively.
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FAQ
CVE-2025-38700 is a critical vulnerability in the Linux kernel related to memory allocation in the SCSI libiscsi subsystem, which can lead to system crashes.
Debian versions 11, 12, 13, and 14 are affected, with specific fixed versions available for Debian 13 and 14.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
While there are no specific workarounds, it is crucial to prioritize updating your kernel to mitigate the risk of this vulnerability.
Failure to address this vulnerability may result in system instability, crashes, and potential data loss due to invalid memory access.
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