CVE-2026-64010
Received Received - Intake

Use-After-Free in Linux Kernel NFC LLCP

Publication date: 2026-07-19

Last updated on: 2026-07-19

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: Fix use-after-free race in nfc_llcp_recv_cc() A race condition exists in the NFC LLCP connection state machine where the connection acceptance packet (CC) can be processed concurrently with socket release. This can lead to a use-after-free of the socket object. When nfc_llcp_recv_cc() moves the socket from the connecting_sockets list to the sockets list, it does so without holding the socket lock. If llcp_sock_release() is executing concurrently, it might have already unlinked the socket and dropped its references, which can result in nfc_llcp_recv_cc() linking a freed socket into the live list. Fix this by holding lock_sock() during the state transition and list movement in nfc_llcp_recv_cc(). After acquiring the lock, check if the socket is still hashed to ensure it hasn't already been unlinked and marked for destruction by the release path. This aligns the locking pattern with recv_hdlc() and recv_disc().

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Meta Information

Published
2026-07-19
Last Modified
2026-07-19
Generated
2026-07-20
AI Q&A
2026-07-19
EPSS Evaluated
N/A
NVD
CVE-2026-64010
EUVD
EUVD-2026-45583

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a use-after-free vulnerability in the Linux kernel's NFC LLCP (Near Field Communication Logical Link Control Protocol) implementation. A race condition occurs in the connection state machine where a connection acceptance packet (CC) is processed at the same time as a socket is being released. This can lead to the socket being freed while still in use, causing a use-after-free error.

Detection Guidance

This vulnerability is specific to the Linux kernel's NFC LLCP implementation and may not have direct network detection commands. Check kernel logs for crashes or errors related to NFC or LLCP modules using dmesg or journalctl. Monitor for socket-related issues in nfc_llcp_recv_cc().

Impact Analysis

This vulnerability could allow an attacker to cause a denial-of-service (system crash) or potentially execute arbitrary code with kernel privileges. It affects systems using NFC LLCP functionality, which may include devices with NFC capabilities like smartphones or IoT devices.

Compliance Impact

This vulnerability involves a use-after-free race condition in the Linux kernel's NFC LLCP connection handling, which could lead to memory corruption or crashes. While not directly impacting GDPR or HIPAA compliance, such vulnerabilities may compromise system integrity, potentially affecting data confidentiality and availability required by these regulations.

Mitigation Strategies

Update your Linux kernel to the latest patched version that includes the fix for CVE-2026-64010. If immediate patching is not possible, disable the NFC LLCP module by unloading the nfc and llcp kernel modules until the update is applied.

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