CVE-2026-89528

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.