CVE-2026-64010
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Use-After-Free in Linux Kernel NFC LLCP
Vulnerability report for CVE-2026-64010, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-07-19
Last updated on: 2026-10-13
Assigner: kernel.org
Description
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().
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | From 5.16 (inc) to 6.1.176 (exc) |
| linux | linux_kernel | From 6.13 (inc) to 6.18.35 (exc) |
| linux | linux_kernel | From 6.2 (inc) to 6.6.143 (exc) |
| linux | linux_kernel | From 6.7 (inc) to 6.12.93 (exc) |
| linux | linux_kernel | From 5.11 (inc) to 5.15.210 (exc) |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | From 3.6 (inc) to 5.10.259 (exc) |
| linux | linux_kernel | From 6.19 (inc) to 7.0.12 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
| CWE-362 | The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. |
