CVE-2022-49923

Local memory exhaustion via unfreed NFC buffers

Published May 1, 2025 · Updated May 11, 2026

Memory leak in the NXP NCI NFC driver in Linux allows local users to exhaust kernel memory through repeated NFC transmissions. nxp_nci_send() releases its skb only when nxp_nci_i2c_write() fails, leaving every successfully transmitted buffer allocated. Reachability requires a configured NXP NCI device and successful I2C sends; the bounded consequence is memory exhaustion and service interruption.

CVSS severity5.5
Medium
EPSS probability0.18%
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 the NXP NCI NFC driver in Linux allows local users to exhaust kernel memory through repeated NFC transmissions. nxp_nci_send() releases its skb only when nxp_nci_i2c_write() fails, leaving every successfully transmitted buffer allocated. Reachability requires a configured NXP NCI device and successful I2C sends; the bounded consequence is memory exhaustion and service interruption.

The record

CVE
CVE-2022-49923
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.1
  2. Affected versionversion=dece45855a8b0d1dcf48eb01d0822070ded6a4c8 <3cba1f061bfe23fece2841129ca2862cdec29d5c
  3. Affected versionversion=dece45855a8b0d1dcf48eb01d0822070ded6a4c8 <3ecf0f4227029b2c42e036b10ff6e5d09e20821e
  4. Affected versionversion=dece45855a8b0d1dcf48eb01d0822070ded6a4c8 <7bf1ed6aff0f70434bd0cdd45495e83f1dffb551
  5. Affected versionversion=dece45855a8b0d1dcf48eb01d0822070ded6a4c8 <9ae2c9a91ff068f4c3e392f47e8e26a1c9f85ebb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.1; version=dece45855a8b0d1dcf48eb01d0822070ded6a4c8 <3cba1f061bfe23fece2841129ca2862cdec29d5c; version=dece45855a8b0d1dcf48eb01d0822070ded6a4c8 <3ecf0f4227029b2c42e036b10ff6e5d09e20821e; version=dece45855a8b0d1dcf48eb01d0822070ded6a4c8 <7bf1ed6aff0f70434bd0cdd45495e83f1dffb551; version=dece45855a8b0d1dcf48eb01d0822070ded6a4c8 <9ae2c9a91ff068f4c3e392f47e8e26a1c9f85ebb

Published CVSS scores

5.5CISA-ADPCVSS: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

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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