CVE-2026-98059bpf: Mark sched_process_wait argument as nullable
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Undergoing Analysis
- Record last updated
- Sep 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from b2fc4b17fc13810ef440fb323fad3981cd174985 before bee862c79cb7e0e5c33b2df2e3a31d164705120d; 838a10bd2ebfe11a60dd67687533a7cfc220cc86 builds before 3c03a1b8ded858685a73c1ba4080adef99db4544; from 838a10bd2ebfe11a60dd67687533a7cfc220cc86 before b9205e936dde9a94e93376c8de6195b740bcd5d2; from 838a10bd2ebfe11a60dd67687533a7cfc220cc86 before a453d6e3b8e8e1a321c8744d6189d763af9287d0; from 6.12.6 before 6.12.111 | CNA record |
References
- https://git.kernel.org/stable/c/bee862c79cb7e0e5c33b2df2e3a31d164705120d
- https://git.kernel.org/stable/c/3c03a1b8ded858685a73c1ba4080adef99db4544
- https://git.kernel.org/stable/c/b9205e936dde9a94e93376c8de6195b740bcd5d2
- https://git.kernel.org/stable/c/a453d6e3b8e8e1a321c8744d6189d763af9287d0
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.