{"id":"CVE-2026-98059","summary":"bpf: Mark sched_process_wait argument as nullable","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark sched_process_wait argument as nullable\n\ndo_wait() passes wo-\u003ewo_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.","modified":"2026-09-26T03:48:42.624363009Z","published":"2026-09-25T10:24:04.788Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98059.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3c03a1b8ded858685a73c1ba4080adef99db4544"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a453d6e3b8e8e1a321c8744d6189d763af9287d0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9205e936dde9a94e93376c8de6195b740bcd5d2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bee862c79cb7e0e5c33b2df2e3a31d164705120d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98059.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98059"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b2fc4b17fc13810ef440fb323fad3981cd174985"},{"fixed":"bee862c79cb7e0e5c33b2df2e3a31d164705120d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"838a10bd2ebfe11a60dd67687533a7cfc220cc86"},{"fixed":"3c03a1b8ded858685a73c1ba4080adef99db4544"},{"fixed":"b9205e936dde9a94e93376c8de6195b740bcd5d2"},{"fixed":"a453d6e3b8e8e1a321c8744d6189d763af9287d0"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.12.6"},{"fixed":"6.12.111"}]}],"versions":["v6.12.110","v6.12.109","v6.12.108","v6.12.107","v6.12.106","v6.12.105","v6.12.104","v6.12.103","v6.12.102","v6.12.101","v6.12.100","v6.12.99","v6.12.98","v6.12.97","v6.12.96","v6.12.95","v6.12.94","v6.12.93","v6.12.92","v6.12.91","v6.12.90","v6.12.89","v6.12.88","v6.12.87","v6.12.86","v6.12.85","v6.12.84","v6.12.83","v6.12.82","v6.12.81","v6.12.80","v6.12.79","v6.12.78","v6.12.77","v6.12.76","v6.12.75","v6.12.74","v6.12.73","v6.12.72","v6.12.71","v6.12.70","v6.12.69","v6.12.68","v6.12.67","v6.12.66","v6.12.65","v6.12.64","v6.12.63","v6.12.62","v6.12.61","v6.12.60","v6.12.59","v6.12.58","v6.12.57","v6.12.56","v6.12.55","v6.12.54","v6.12.53","v6.12.52","v6.12.51","v6.12.50","v6.12.49","v6.12.48","v6.12.47","v6.12.46","v6.12.45","v6.12.44","v6.12.43","v6.12.42","v6.12.41","v6.12.40","v6.12.39","v6.12.38","v6.12.37","v6.12.36","v6.12.35","v6.12.34","v6.12.33","v6.12.32","v6.12.31","v6.12.30","v6.12.29","v6.12.28","v6.12.27","v6.12.26","v6.12.25","v6.12.24","v6.12.23","v6.12.22","v6.12.21","v6.12.20","v6.12.19","v6.12.18","v6.12.17","v6.12.16","v6.12.15","v6.12.14","v6.12.13","v6.12.12","v6.12.11","v6.12.10","v6.12.9","v6.12.8","v6.12.7","v6.12.6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98059.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"},{"fixed":"7.2.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98059.json"}}],"schema_version":"1.9.0"}