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CVE-2026-31629 In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: add missing return after LLCP_CLOSED…

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: add missing return after LLCP_CLOSED checks In nfc_llcp_recv_hdlc() and nfc_llcp_recv_disc(), when the socket state is LLCP_CLOSED, the code correctly calls release_sock() and nfc_llcp_sock_put() but fails to return. Execution falls through to the remainder of the function, which calls release_sock() and nfc_llcp_sock_put() again. This results in a double release_sock() and a refcount underflow via double nfc_llcp_sock_put(), leading to a use-after-free. Add the missing return statements after the LLCP_CLOSED branches in both functions to prevent the fall-through.

Produits et versions touchés

Produit	Versions touchées	Corrigé en
Linux 7.1	premières → < 7.1	7.1
Linux 7.0	premières → < 7.0.1	7.0.1
Linux 6.19	premières → < 6.19.14	6.19.14
Linux 6.18	premières → < 6.18.24	6.18.24
Linux 6.12	premières → < 6.12.83	6.12.83
Linux 6.6	premières → < 6.6.136	6.6.136
Linux 6.1	premières → < 6.1.175	6.1.175
Linux 5.15	premières → < 5.15.209	5.15.209
Linux 5.10	premières → < 5.10.258	5.10.258