CVE-2026-31629

Katalog CVE

CVSS 8.8 · High EPSS 0,35%

Kerentanan Improper Locking pada linux kernel. Skor CVSS 3.1 8.8 (High) menurut CNA.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

24 April 2026

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

8.8 (High), sumber CNA
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-667: Improper Locking

EPSS (30 hari)

0,35% peluang dieksploitasi; lebih tinggi dari 26,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/0eb1263a3b8c36418c9ba295c9ab3abed664edbf patch
• https://git.kernel.org/stable/c/2b5dd4632966c39da6ba74dbc8689b309065e82c patch
• https://git.kernel.org/stable/c/796e0cac058252d0ad34ebe288e6f7979b5fc9b2 patch
• https://git.kernel.org/stable/c/8977fad2b3c6eefd414131168d597c5d1d5e1abf patch
• https://git.kernel.org/stable/c/aba4712e8f0381cd5d196534ce2ad082626a5ab6 patch
• https://git.kernel.org/stable/c/ff3d9e8f7244293e303f7b6ef70774291c7c27e9 patch
• https://git.kernel.org/stable/c/665315df9c3486cb213fc44d83cc8bcd47fe0d26
• https://git.kernel.org/stable/c/9b49e2a4b8219a2fc5cebf94f4ec34e509aff8a6
• https://git.kernel.org/stable/c/b2a23529593d011fb433a3d711fc597ed6a6bd2f