CVE-2026-98059: Linux kernel · bpf: Mark sched_process_wait argument as nullable
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in bee862c79cb7e0e5c33b2df2e3a31d164705120d : update Linux kernel when convenient.
Data as of 26 Oct 2026, 12:55 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in bee862c79cb7e0e5c33b2df2e3a31d164705120d, b9205e936dde9a94e93376c8de6195b740bcd5d2, a453d6e3b8e8e1a321c8744d6189d763af9287d0 +2
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available in Linux kernel version 6.12.111 and later. Users should upgrade to version 6.12.111 or later to address this issue. No additional mitigation is required beyond applying the official kernel update.
Description
A vulnerability in the Linux kernel's BPF subsystem involves the sched_process_wait tracepoint argument being improperly marked as non-nullable. This allows the BPF verifier to accept unchecked dereferences of a pointer that can be NULL, potentially causing a NULL pointer dereference in JITed BPF code when waiting for any child process. The issue is fixed by marking the argument as nullable, causing the verifier to reject unsafe dereferences unless the pointer is explicitly checked for NULL.
References
- git.kernel.org/stable/c/bee862c79cb7e0e5c33b2df2e3a31d164705120d (opens in a new tab)
- git.kernel.org/stable/c/3c03a1b8ded858685a73c1ba4080adef99db4544 (opens in a new tab)
- git.kernel.org/stable/c/b9205e936dde9a94e93376c8de6195b740bcd5d2 (opens in a new tab)
- git.kernel.org/stable/c/a453d6e3b8e8e1a321c8744d6189d763af9287d0 (opens in a new tab)