CVE-2026-98019Hinoki check available

Unspecified impact via imprecise BPF argument tracking

Published Sep 25, 2026 · Updated Sep 25, 2026

Improper BPF verifier state pruning in Linux allows local users able to load BPF programs to cause unspecified impact through crafted input. In check_func_arg() and check_helper_call(), NULL-accepted scalar arguments are not marked precise, so checkpoints can prune states against arbitrary scalar values. Reaching the flaw requires permission to load a crafted BPF program; the upstream record does not identify a concrete confidentiality, integrity, or availability consequence.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper BPF verifier state pruning in Linux allows local users able to load BPF programs to cause unspecified impact through crafted input. In check_func_arg() and check_helper_call(), NULL-accepted scalar arguments are not marked precise, so checkpoints can prune states against arbitrary scalar values. Reaching the flaw requires permission to load a crafted BPF program; the upstream record does not identify a concrete confidentiality, integrity, or availability consequence.

The record

CVE
CVE-2026-98019
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.3
  2. Affected versionversion=b5dc0163d8fd78e64a7e21f309cf932fda34353e <1a3a10b030c96ea88868ccc060a16827c01eaa5a
  3. Affected versionversion=b5dc0163d8fd78e64a7e21f309cf932fda34353e <69a9ad004ccf5d45e534c7d503f47f643abe64b7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.3; version=b5dc0163d8fd78e64a7e21f309cf932fda34353e <1a3a10b030c96ea88868ccc060a16827c01eaa5a; version=b5dc0163d8fd78e64a7e21f309cf932fda34353e <69a9ad004ccf5d45e534c7d503f47f643abe64b7

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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