---
id: CVE-2026-98059
title: |-
  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), an…
summary: |-
  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), an…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= b2fc4b17fc13810ef440fb323fad3981cd174985 <
    bee862c79cb7e0e5c33b2df2e3a31d164705120d
  - >-
    Linux >= 838a10bd2ebfe11a60dd67687533a7cfc220cc86 <
    3c03a1b8ded858685a73c1ba4080adef99db4544
  - >-
    Linux >= 838a10bd2ebfe11a60dd67687533a7cfc220cc86 <
    b9205e936dde9a94e93376c8de6195b740bcd5d2
  - >-
    Linux >= 838a10bd2ebfe11a60dd67687533a7cfc220cc86 <
    a453d6e3b8e8e1a321c8744d6189d763af9287d0
  - Linux >= 6.12.6 < 6.12.111
  - Linux 6.13
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:34.873'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98059'
references:
  - url: 'https://git.kernel.org/stable/c/3c03a1b8ded858685a73c1ba4080adef99db4544'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a453d6e3b8e8e1a321c8744d6189d763af9287d0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b9205e936dde9a94e93376c8de6195b740bcd5d2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bee862c79cb7e0e5c33b2df2e3a31d164705120d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.844Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.