In the Linux kernel, the following vulnerability has been resolved:
bpf: Mark sched_process_wait argument as nullable
do_wait() passes wo->wo_pid to the sched_process_wait tracepoint. kernel_wait4() leaves wo_pid NULL for wait4(-1), and kernel_waitid_prepare() does likewise for waitid(P_ALL).
btf_ctx_access() currently types argument 0 as PTR_TO_BTF_ID | PTR_TRUSTED. Without PTR_MAYBE_NULL, the verifier accepts an unchecked dereference. Trusted pointer loads have no fault protection, so a wait for any child can then cause a NULL pointer dereference in JITed BPF code.
Add sched_process_wait to raw_tp_null_args[] with argument 0 marked nullable. The verifier rejects an unchecked dereference while preserving access after the program checks the pointer for NULL.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade bpftool6.12-debuginfoUpgrade kernel6.12-headersUpgrade perf6.12Upgrade kernel-livepatch-6.12.111-136.204Upgrade kernel6.12Upgrade kernel6.12-modules-extraUpgrade bpftool6.12Upgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-develUpgrade kernel6.12-debuginfoUpgrade python3-perf6.12Upgrade kernel6.12-toolsUpgrade perf6.12-debuginfoUpgrade python3-perf6.12-debuginfoUpgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-tools-devel | Oct 13, 2026 | Sep 25, 2026 |
| Debian | — | Upgrade linux-6.12Upgrade linux | Sep 30, 2026 | Sep 25, 2026 |
| Redhat_linux | — | No solution exists | Sep 30, 2026 | Sep 25, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2026 | Sep 25, 2026 |
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