Linux Kernel Vulnerability in BPF Local Storage Management by Linux Foundation

CVE-2023-53857

What is CVE-2023-53857?

In the Linux kernel, a vulnerability in the BPF local storage handling mechanism can lead to unsafe memory allocation while holding a raw_spin_lock. This issue arises in tracing contexts where certain memory management functions may be improperly executed. The vulnerability was identified through the use of the test programs which surfaced problematic locking behaviors. A patch has been provided to prevent memory allocation calls after acquiring the raw_spin_lock, thus mitigating the risk of unexpected behavior or crashes under specific conditions. The context of this issue emphasizes the importance of correct memory management practices in kernel development and the potential risks of improperly securing access to shared resources.

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