bpf: Mark sched_process_wait argument as nullable (CVE-2026-98059) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-98059

bpf: Mark sched_process_wait argument as nullable

Answer in brief

CVE-2026-98059 records a Unknown severity vulnerability in bpf: Mark sched_process_wait argument as nullable. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=b2fc4b17fc13810ef440fb323fad3981cd174985 <bee862c79cb7e0e5c33b2df2e3a31d164705120d \|\| >=838a10bd2ebfe11a60dd67687533a7cfc220cc86 <3c03a1b8ded858685a73c1ba4080adef99db4544 \|\| >=838a10bd2ebfe11a60dd67687533a7cfc220cc86 <b9205e936dde9a94e93376c8de6195b740bcd5d2 \|\| >=838a10bd2ebfe11a60dd67687533a7cfc220cc86 <a453d6e3b8e8e1a321c8744d6189d763af9287d0 \|\| >=6.12.6 <6.12.111	bee862c79cb7e0e5c33b2df2e3a31d164705120d, 3c03a1b8ded858685a73c1ba4080adef99db4544, b9205e936dde9a94e93376c8de6195b740bcd5d2, a453d6e3b8e8e1a321c8744d6189d763af9287d0, 6.12.111
Linux/Linuxgeneric	6.13	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to bee862c79cb7e0e5c33b2df2e3a31d164705120d if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.