CVE-2026-80800Hinoki check available

Adjacent out-of-bounds read via malformed LLCP TLV

Published Sep 4, 2026 · Updated Sep 4, 2026

Out-of-bounds read in the Linux kernel NFC LLCP parser allows physically proximate attackers to access memory past an skb via malformed frames. nfc_llcp_connect_sn() reads TLV headers and declared values without checking the skb boundary, and a short frame can underflow its size calculation before memcmp() consumes the returned pointer. Reachability requires an unauthenticated nearby NFC device; the record establishes an invalid kernel-memory read but reports neither data disclosure nor code execution.

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 kernel NFC LLCP parser allows physically proximate attackers to access memory past an skb via malformed frames. nfc_llcp_connect_sn() reads TLV headers and declared values without checking the skb boundary, and a short frame can underflow its size calculation before memcmp() consumes the returned pointer. Reachability requires an unauthenticated nearby NFC device; the record establishes an invalid kernel-memory read but reports neither data disclosure nor code execution.

The record

CVE
CVE-2026-80800
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 <0cfbdb0e13ab5b0765d77f96af67eb879cbc9736
  3. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <1964addc8dd535a05d5d3b55b4d1ac19ae31aa65
  4. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <22e5177ba1196a0b272a6a46c2575eb940a939c4
  5. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <389986fd79e4d43f971a03b512645a1bb63c982f
  6. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <55c68ac93e7dacc0f5f608b9c39dd4ff48cf28e8
  7. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <65a0ec7783b06068dda6745dd689bf4a91ee64aa
  8. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <b2ebdfe3d5b76e91f267a61cbc3f9a0e3f77071e
  9. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <e18d044bab6d3d0280639098c3fe6621692cbfe2
  10. Affected versionversion=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <e87527b506c40db9af528714b7b1240918eb80fc

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.3; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <0cfbdb0e13ab5b0765d77f96af67eb879cbc9736; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <1964addc8dd535a05d5d3b55b4d1ac19ae31aa65; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <22e5177ba1196a0b272a6a46c2575eb940a939c4; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <389986fd79e4d43f971a03b512645a1bb63c982f; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <55c68ac93e7dacc0f5f608b9c39dd4ff48cf28e8; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <65a0ec7783b06068dda6745dd689bf4a91ee64aa; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <b2ebdfe3d5b76e91f267a61cbc3f9a0e3f77071e; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <e18d044bab6d3d0280639098c3fe6621692cbfe2; version=d646960f7986fefb460a2b062d5ccc8ccfeacc3a <e87527b506c40db9af528714b7b1240918eb80fc

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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