CVE-2026-98580Hinoki check available

Kernel crash via LLCP socket-lifecycle race

Published Oct 18, 2026 · Updated Oct 18, 2026

A race in Linux NFC LLCP socket handling allows attackers to crash the kernel via concurrent accept() and socket teardown. In nfc_llcp_socket_release(), bh_lock_sock() does not exclude the process-context lock held during acceptance, allowing both paths to unlink and release the same child socket. Triggering requires overlapping acceptance and teardown of queued NFC LLCP child sockets, resulting in use-after-free or a NULL pointer dereference; privilege escalation is not established.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A race in Linux NFC LLCP socket handling allows attackers to crash the kernel via concurrent accept() and socket teardown. In nfc_llcp_socket_release(), bh_lock_sock() does not exclude the process-context lock held during acceptance, allowing both paths to unlink and release the same child socket. Triggering requires overlapping acceptance and teardown of queued NFC LLCP child sockets, resulting in use-after-free or a NULL pointer dereference; privilege escalation is not established.

The record

CVE
CVE-2026-98580
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 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=3.7
  2. Affected versionversion=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <41256821762a7114906b178826d17098e2fa5992
  3. Affected versionversion=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <53867f6acb1af7f12d6485fa8a2819318f89083b
  4. Affected versionversion=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <54adcabb0f1deef1bdae5fc64779ed6d442721c9
  5. Affected versionversion=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <7c938aad5108382c6ad7453c4b5ee8ae3f3252ed
  6. Affected versionversion=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <c3eef2f988a3db9690369d7cef9a3344dd9788d3
  7. Affected versionversion=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <d2093a0981138876212bc5f473bdbfba0786e064
  8. Affected versionversion=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <d5e1c92d09caed19f2988739695ce611a86ba6f8
  9. Affected versionversion=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <da8a07757383614a8380a0f7dd54749d2687b82e

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.7; version=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <41256821762a7114906b178826d17098e2fa5992; version=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <53867f6acb1af7f12d6485fa8a2819318f89083b; version=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <54adcabb0f1deef1bdae5fc64779ed6d442721c9; version=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <7c938aad5108382c6ad7453c4b5ee8ae3f3252ed; version=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <c3eef2f988a3db9690369d7cef9a3344dd9788d3; version=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <d2093a0981138876212bc5f473bdbfba0786e064; version=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <d5e1c92d09caed19f2988739695ce611a86ba6f8; version=50b78b2a6500d0e97c204c1b6c51df8c17358bbe <da8a07757383614a8380a0f7dd54749d2687b82e

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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