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CVE-2026-31629A-499350302ASB-A-499350302

nfc: llcp: add missing return after LLCP_CLOSED checks

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, and 4 more
None on Exploit-DB, Metasploit or GitHub

Summary

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From d646960f7986fefb460a2b062d5ccc8ccfeacc3a · fixed in b2a23529593d011fb433a3d711fc597ed6a6bd2f; From d646960f7986fefb460a2b062d5ccc8ccfeacc3a · fixed in 665315df9c3486cb213fc44d83cc8bcd47fe0d26; From d646960f7986fefb460a2b062d5ccc8ccfeacc3a · fixed in 9b49e2a4b8219a2fc5cebf94f4ec34e509aff8a6; From d646960f7986fefb460a2b062d5ccc8ccfeacc3a · fixed in 0eb1263a3b8c36418c9ba295c9ab3abed664edbf; From d646960f7986fefb460a2b062d5ccc8ccfeacc3a · fixed in 796e0cac058252d0ad34ebe288e6f7979b5fc9b2; From d646960f7986fefb460a2b062d5ccc8ccfeacc3a · fixed in 8977fad2b3c6eefd414131168d597c5d1d5e1abf; From d646960f7986fefb460a2b062d5ccc8ccfeacc3a · fixed in ff3d9e8f7244293e303f7b6ef70774291c7c27e9; From d646960f7986fefb460a2b062d5ccc8ccfeacc3a · fixed in aba4712e8f0381cd5d196534ce2ad082626a5ab6; From d646960f7986fefb460a2b062d5ccc8ccfeacc3a · fixed in 2b5dd4632966c39da6ba74dbc8689b309065e82c

  • Linux Linux

    3.3

  • KernelLinux

    From 3.3.0 · fixed in 5.10.258; From 5.11.0 · fixed in 5.15.209; From 5.16.0 · fixed in 6.1.175; From 6.2.0 · fixed in 6.6.136; From 6.7.0 · fixed in 6.12.83; From 6.13.0 · fixed in 6.18.24; From 6.19.0 · fixed in 6.19.14; From 6.20.0 · fixed in 7.0.1

  • :linux_kernel:Android

    From :0 · fixed in :2026-09-05

References 9

git.kernel.org