Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2024-43816
CVE-2024-43816:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2024-43816 is a vulnerability discovered in the Linux kernel affecting the lpfc driver. The issue was identified in the lpfcprepembed_io routine where improper handling of endian formatting could lead to memory out of bounds pointer dereference on big endian architectures when FCP targets are zoned. The vulnerability was disclosed on August 17, 2024 (NVD).
Technical details
The vulnerability exists in the lpfcprepembedio function where memcpy(ptr, fcpcmnd, sgl->sgelen) references a little endian formatted sgl->sgelen value. On big endian systems, this can cause crashes due to improper memory access. The issue stems from not properly converting the endianness of the sge_len value before using it in memory operations (Kernel Commit).
Impact
When exploited, this vulnerability can cause system crashes on big endian architectures when FCP targets are zoned. The impact is primarily related to system stability and availability, as improper memory access can lead to system crashes (NVD).
Mitigation and workarounds
The vulnerability has been fixed by redefining the *sgl pointer as a struct sli4sgele and updating the routine with proper le32tocpu macro usages. The fix includes proper endian conversion using le32tocpu macros and replacing memcpy with lpfcslipcimem_bcopy for safer memory operations (Kernel Commit).
Additional resources
Source: This report was generated using AI
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