CVE-2023-52919

Kernel crash via unchecked NFC buffer allocation

Published Oct 22, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel NFC NCI subsystem before 6.6 allows local users to crash the kernel through memory exhaustion. In net/nfc/nci/spi.c, send_acknowledge() passes an unchecked NULL result from nci_skb_alloc() to skb_push() when alloc_skb() fails. Reaching the fault requires local access, the NFC NCI-over-SPI path, and enough memory pressure to make the kernel allocation fail; impact is limited to service interruption.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel NFC NCI subsystem before 6.6 allows local users to crash the kernel through memory exhaustion. In net/nfc/nci/spi.c, send_acknowledge() passes an unchecked NULL result from nci_skb_alloc() to skb_push() when alloc_skb() fails. Reaching the fault requires local access, the NFC NCI-over-SPI path, and enough memory pressure to make the kernel allocation fail; impact is limited to service interruption.

The record

CVE
CVE-2023-52919
Published
Oct 22, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2024CVE 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=3.11
  2. Affected versionversion=391d8a2da787257aeaf952c974405b53926e3fb3 <2b2edf089df3a69f0072c6e71563394c5a94e62e
  3. Affected versionversion=391d8a2da787257aeaf952c974405b53926e3fb3 <5622592f8f74ae3e594379af02e64ea84772d0dd
  4. Affected versionversion=391d8a2da787257aeaf952c974405b53926e3fb3 <76050b0cc5a72e0c7493287b7e18e1cb9e3c4612
  5. Affected versionversion=391d8a2da787257aeaf952c974405b53926e3fb3 <7937609cd387246aed994e81aa4fa951358fba41
  6. Affected versionversion=391d8a2da787257aeaf952c974405b53926e3fb3 <bb6cacc439ddd2cd51227ab193f4f91cfc7f014f
  7. Affected versionversion=391d8a2da787257aeaf952c974405b53926e3fb3 <c95fa5b20fe03609e0894656fa43c18045b5097e
  8. Affected versionversion=391d8a2da787257aeaf952c974405b53926e3fb3 <d7dbdbe3800a908eecd4975c31be47dd45e2104a
  9. Affected versionversion=391d8a2da787257aeaf952c974405b53926e3fb3 <ffdc881f68073ff86bf21afb9bb954812e8278be

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.11; version=391d8a2da787257aeaf952c974405b53926e3fb3 <2b2edf089df3a69f0072c6e71563394c5a94e62e; version=391d8a2da787257aeaf952c974405b53926e3fb3 <5622592f8f74ae3e594379af02e64ea84772d0dd; version=391d8a2da787257aeaf952c974405b53926e3fb3 <76050b0cc5a72e0c7493287b7e18e1cb9e3c4612; version=391d8a2da787257aeaf952c974405b53926e3fb3 <7937609cd387246aed994e81aa4fa951358fba41; version=391d8a2da787257aeaf952c974405b53926e3fb3 <bb6cacc439ddd2cd51227ab193f4f91cfc7f014f; version=391d8a2da787257aeaf952c974405b53926e3fb3 <c95fa5b20fe03609e0894656fa43c18045b5097e; version=391d8a2da787257aeaf952c974405b53926e3fb3 <d7dbdbe3800a908eecd4975c31be47dd45e2104a; version=391d8a2da787257aeaf952c974405b53926e3fb3 <ffdc881f68073ff86bf21afb9bb954812e8278be

Published CVSS scores

5.5NVDCVSS: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

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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-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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