CVE-2023-52502

Kernel memory corruption via NFC socket reference race

Published Mar 2, 2024 · Updated Aug 5, 2026

Use-after-free in affected Linux kernel NFC LLCP receive processing allows physically proximate attackers to corrupt kernel memory via LLCP traffic. Socket lookup paths release their lock before acquiring a reference, permitting concurrent teardown to free the selected socket before later receive-path use. Exploitation requires an active NFC interface and attacker-controlled LLCP exchanges over a DEP link, enabling kernel-memory reads or writes, control-flow hijacking, or a kernel crash.

CVSS severity8.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in affected Linux kernel NFC LLCP receive processing allows physically proximate attackers to corrupt kernel memory via LLCP traffic. Socket lookup paths release their lock before acquiring a reference, permitting concurrent teardown to free the selected socket before later receive-path use. Exploitation requires an active NFC interface and attacker-controlled LLCP exchanges over a DEP link, enabling kernel-memory reads or writes, control-flow hijacking, or a kernel crash.

The record

CVE
CVE-2023-52502
Published
Mar 2, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, CWE-362, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.6
  2. Affected versionversion=8f50020ed9b81ba909ce9573f9d05263cdebf502 <31c07dffafce914c1d1543c135382a11ff058d93
  3. Affected versionversion=8f50020ed9b81ba909ce9573f9d05263cdebf502 <6ac22ecdaad2ecc662048f8c6b0ceb1ca0699ef9
  4. Affected versionversion=8f50020ed9b81ba909ce9573f9d05263cdebf502 <7adcf014bda16cdbf804af5c164d94d5d025db2d
  5. Affected versionversion=8f50020ed9b81ba909ce9573f9d05263cdebf502 <d1af8a39cf839d93c8967fdd858f6bbdc3e4a15c
  6. Affected versionversion=8f50020ed9b81ba909ce9573f9d05263cdebf502 <d888d3f70b0de32b4f51534175f039ddab15eef8
  7. Affected versionversion=8f50020ed9b81ba909ce9573f9d05263cdebf502 <e4f2611f07c87b3ddb57c4b9e8efcd1e330fc3dc
  8. Affected versionversion=8f50020ed9b81ba909ce9573f9d05263cdebf502 <e863f5720a5680e50c4cecf12424d7cc31b3eb0a

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.6; version=8f50020ed9b81ba909ce9573f9d05263cdebf502 <31c07dffafce914c1d1543c135382a11ff058d93; version=8f50020ed9b81ba909ce9573f9d05263cdebf502 <6ac22ecdaad2ecc662048f8c6b0ceb1ca0699ef9; version=8f50020ed9b81ba909ce9573f9d05263cdebf502 <7adcf014bda16cdbf804af5c164d94d5d025db2d; version=8f50020ed9b81ba909ce9573f9d05263cdebf502 <d1af8a39cf839d93c8967fdd858f6bbdc3e4a15c; version=8f50020ed9b81ba909ce9573f9d05263cdebf502 <d888d3f70b0de32b4f51534175f039ddab15eef8; version=8f50020ed9b81ba909ce9573f9d05263cdebf502 <e4f2611f07c87b3ddb57c4b9e8efcd1e330fc3dc; version=8f50020ed9b81ba909ce9573f9d05263cdebf502 <e863f5720a5680e50c4cecf12424d7cc31b3eb0a

Published CVSS scores

8.8Linux Kernel CVE TeamCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1210Exploitation of Remote Services

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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