CVE-2026-98059
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.
Affected versions
Linux kernel versions
6.12.6,
6.13
and later are affected. Fixed in
6.12.111,
6.18.53,
7.2.7,
7.3-rc2
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-98059?
CVE-2026-98059 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.12.6 onward and has been patched in 6.12.111, 6.18.53, 7.2.7 and others. CVE-2026-98059 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-98059?
Yes. CVE-2026-98059 has been patched. Fixed versions include 6.12.111, 6.18.53, 7.2.7 and others. If you are running Linux kernel 6.12.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-98059 actively exploited?
No. CVE-2026-98059 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.