bpf: Mark sched_process_wait argument as nullable

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98059
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:34 UTC
Updated2026-09-30 14:10:59 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001680000 probability, percentile 0.053930000 (date 2026-09-27)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b2fc4b17fc13810ef440fb323fad3981cd174985 bee862c79cb7e0e5c33b2df2e3a31d164705120d git Not specified
CNA Linux Linux affected 838a10bd2ebfe11a60dd67687533a7cfc220cc86 3c03a1b8ded858685a73c1ba4080adef99db4544 git Not specified
CNA Linux Linux affected 838a10bd2ebfe11a60dd67687533a7cfc220cc86 b9205e936dde9a94e93376c8de6195b740bcd5d2 git Not specified
CNA Linux Linux affected 838a10bd2ebfe11a60dd67687533a7cfc220cc86 a453d6e3b8e8e1a321c8744d6189d763af9287d0 git Not specified
CNA Linux Linux affected 6.12.6 6.12.111 semver Not specified
CNA Linux Linux affected 6.13 Not specified
CNA Linux Linux unaffected 6.13 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3c03a1b8ded858685a73c1ba4080adef99db4544 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a453d6e3b8e8e1a321c8744d6189d763af9287d0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b9205e936dde9a94e93376c8de6195b740bcd5d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bee862c79cb7e0e5c33b2df2e3a31d164705120d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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