CVE-2026-23330

Local service interruption via NFC socket leak

Published Mar 25, 2026 · Updated Mar 25, 2026

Memory leak in Linux Kernel 3.2 through 6.18.16 and 6.19 through 6.19.6 allows local users to exhaust memory via NFC device closure. The nci_close_device() path closes an NCI device without completing a pending data exchange, leaving the callback-held raw NFC socket reference unreleased. Repeated closes during pending exchanges can consume unreclaimable kernel memory and interrupt service under memory pressure; local access to the NFC NCI interface is required.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Linux Kernel 3.2 through 6.18.16 and 6.19 through 6.19.6 allows local users to exhaust memory via NFC device closure. The nci_close_device() path closes an NCI device without completing a pending data exchange, leaving the callback-held raw NFC socket reference unreleased. Repeated closes during pending exchanges can consume unreclaimable kernel memory and interrupt service under memory pressure; local access to the NFC NCI interface is required.

The record

CVE
CVE-2026-23330
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 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=3.2
  2. Affected versionversion=38f04c6b1b682f1879441e2925403ad9aff9e229 <66083581945bd5b8e99fe49b5aeb83d03f62d053
  3. Affected versionversion=38f04c6b1b682f1879441e2925403ad9aff9e229 <91ff0d8c3464da7f0c43da38c195e60b660128bf
  4. Affected versionversion=38f04c6b1b682f1879441e2925403ad9aff9e229 <d05f55d68ebdebb2b0a8480d766eaae88c8c92de

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.2; version=38f04c6b1b682f1879441e2925403ad9aff9e229 <66083581945bd5b8e99fe49b5aeb83d03f62d053; version=38f04c6b1b682f1879441e2925403ad9aff9e229 <91ff0d8c3464da7f0c43da38c195e60b660128bf; version=38f04c6b1b682f1879441e2925403ad9aff9e229 <d05f55d68ebdebb2b0a8480d766eaae88c8c92de

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
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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Your stack

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