{"id":"CVE-2026-98059","published":"2026-09-25T11:17:34.873","lastModified":"2026-09-25T11:17:34.873","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark sched_process_wait argument as nullable\n\ndo_wait() passes wo->wo_pid to the sched_process_wait tracepoint.\nkernel_wait4() leaves wo_pid NULL for wait4(-1), and\nkernel_waitid_prepare() does likewise for waitid(P_ALL).\n\nbtf_ctx_access() currently types argument 0 as PTR_TO_BTF_ID |\nPTR_TRUSTED. Without PTR_MAYBE_NULL, the verifier accepts an unchecked\ndereference. Trusted pointer loads have no fault protection, so a wait for\nany child can then cause a NULL pointer dereference in JITed BPF code.\n\nAdd sched_process_wait to raw_tp_null_args[] with argument 0 marked\nnullable. The verifier rejects an unchecked dereference while preserving\naccess after the program checks the pointer for NULL.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/3c03a1b8ded858685a73c1ba4080adef99db4544","tags":[]},{"url":"https://git.kernel.org/stable/c/a453d6e3b8e8e1a321c8744d6189d763af9287d0","tags":[]},{"url":"https://git.kernel.org/stable/c/b9205e936dde9a94e93376c8de6195b740bcd5d2","tags":[]},{"url":"https://git.kernel.org/stable/c/bee862c79cb7e0e5c33b2df2e3a31d164705120d","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}