CyberRota Analysis
AI-GeneratedThe vulnerability in the Linux kernel affects the svcrdma component, where the system fails to properly validate cumulative lengths of multiple Read segments against the page budget. This oversight can lead to a NULL pointer dereference during DMA mapping, potentially causing system crashes or instability. Organizations using Linux systems with svcrdma should prioritize addressing this vulnerability to maintain system integrity and prevent potential disruptions.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject Read lists that exceed the page budget Individual Read segment lengths are validated at decode time, but nothing prevents a requester from sending multiple segments whose cumulative length exceeds the rq_pages array budget. When one segment fills the page array exactly, the runtime guard in svc_rdma_build_read_segment() is bypassed because len reaches zero. A subsequent segment then accesses the NULL sentinel slot at rq_pages[rq_maxpages], resulting in a NULL pointer dereference during DMA mapping. Accumulate pages across all Read segments and reject the message at decode time when the total would overflow the page budget.