In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Fix kernel stack leak in irdmacreateuserah() struct irdmacreateahresp { // 8 bytes, no padding __u32 ahid; // offset 0 - SET (uresp.ahid = ah->sc_ah.ahinfo.ahidx) _u8 rsvd[4]; // offset 4 - NEVER SET <- LEAK }; rsvd[4]: 4 bytes of stack memory leaked unconditionally. Only ahid is assigned before ibrespondudata(). The reserved members of the structure were not zeroed.