CVE-2026-80794Hinoki check available

Kernel memory disclosure via uninitialized NFC notification

Published Sep 4, 2026 · Updated Sep 4, 2026

Uninitialized memory use in the Linux kernel NFC NCI subsystem allows local users to read stale kernel data through NFC target queries. The nci_rf_discover_ntf_packet() and nci_rf_intf_activated_ntf_packet() handlers leave on-stack notification unions uninitialized when the technology-specific parameter length is zero, then nci_add_new_protocol() uses the stale nfcid1_len value to control copies into target records. Reachability requires a zero-length NCI RF discovery or activation notification and later enumeration through NFC_CMD_GET_TARGET; disclosure is limited to stale target-field contents.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Uninitialized memory use in the Linux kernel NFC NCI subsystem allows local users to read stale kernel data through NFC target queries. The nci_rf_discover_ntf_packet() and nci_rf_intf_activated_ntf_packet() handlers leave on-stack notification unions uninitialized when the technology-specific parameter length is zero, then nci_add_new_protocol() uses the stale nfcid1_len value to control copies into target records. Reachability requires a zero-length NCI RF discovery or activation notification and later enumeration through NFC_CMD_GET_TARGET; disclosure is limited to stale target-field contents.

The record

CVE
CVE-2026-80794
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1005
Attack vector
local
Privileges
Unavailable

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=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <0d4b5cfab6891a5ca0f6aef209beebba4bd7c095
  3. Affected versionversion=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <1007a6b429d756513abd25bd00290908f2e89a4a
  4. Affected versionversion=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <4bda9ef8392710f21e99027467f3f4afdfb5c99a
  5. Affected versionversion=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <5bd00c0e1470d90d77a7c60242854257ddf14e00
  6. Affected versionversion=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <7086dab72b3ed95df96842801e10e935cfeb27a3
  7. Affected versionversion=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <7489f59d1ea2d3298aa41de7baf193e5e6e132f6
  8. Affected versionversion=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <8cbe06c1e699c0a165dae5093a2550e65f914818
  9. Affected versionversion=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <d6f743d3d388913135681cde051c08823730194f
  10. Affected versionversion=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <fe69fed3495f676578d49414a069ad7d8468e2ce

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.3; version=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <0d4b5cfab6891a5ca0f6aef209beebba4bd7c095; version=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <1007a6b429d756513abd25bd00290908f2e89a4a; version=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <4bda9ef8392710f21e99027467f3f4afdfb5c99a; version=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <5bd00c0e1470d90d77a7c60242854257ddf14e00; version=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <7086dab72b3ed95df96842801e10e935cfeb27a3; version=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <7489f59d1ea2d3298aa41de7baf193e5e6e132f6; version=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <8cbe06c1e699c0a165dae5093a2550e65f914818; version=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <d6f743d3d388913135681cde051c08823730194f; version=e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 <fe69fed3495f676578d49414a069ad7d8468e2ce

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

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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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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