CVE-2026-80798Hinoki check available

Kernel out-of-bounds read via short LLCP PDU

Published Sep 4, 2026 · Updated Sep 4, 2026

Out-of-bounds read in the Linux NFC LLCP receive path allows physically proximate attackers to read kernel memory via a short PDU. nfc_llcp_rx_skb reads two header bytes without first ensuring LLCP_HEADER_SIZE is present, and short CONNECT or CC frames underflow the TLV length before an unbounded walk. LLCP activation occurs automatically after NFC-DEP, so an unauthenticated NFC peer at close range can reach the faulty parser without local access.

CVSS severityUnavailable
Unscored
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds read in the Linux NFC LLCP receive path allows physically proximate attackers to read kernel memory via a short PDU. nfc_llcp_rx_skb reads two header bytes without first ensuring LLCP_HEADER_SIZE is present, and short CONNECT or CC frames underflow the TLV length before an unbounded walk. LLCP activation occurs automatically after NFC-DEP, so an unauthenticated NFC peer at close range can reach the faulty parser without local access.

The record

CVE
CVE-2026-80798
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=3.3
  2. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <3793d768b40f38bb97265dd5b9a8b8655c4e1b1d
  3. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <95674f506c6376d6722a23144c9acd26609771ed
  4. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <a7b9b449f5a5132221fff6adc11a9431ab8cd914
  5. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <ae5f20f5842f440b72d030e3a34fe182dd8eae42
  6. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <d3d90243393c48146911c67fd3792b549d21d9e6
  7. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <e6ec76a68dce04884dfeccfe5a5f0e9f67c0ec82
  8. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <e969e98410051b1ef8cc318bfe0c7e3f24ec766d
  9. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <eab47618e282602197db287ecbd1b09d356a2515
  10. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <f36cffea24bf3e2cc29a00d4b51dbcadc087d810

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.3; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <3793d768b40f38bb97265dd5b9a8b8655c4e1b1d; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <95674f506c6376d6722a23144c9acd26609771ed; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <a7b9b449f5a5132221fff6adc11a9431ab8cd914; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <ae5f20f5842f440b72d030e3a34fe182dd8eae42; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <d3d90243393c48146911c67fd3792b549d21d9e6; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <e6ec76a68dce04884dfeccfe5a5f0e9f67c0ec82; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <e969e98410051b1ef8cc318bfe0c7e3f24ec766d; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <eab47618e282602197db287ecbd1b09d356a2515; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <f36cffea24bf3e2cc29a00d4b51dbcadc087d810

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
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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