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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-31629 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0eb1263a3b8c36418c9ba295c9ab3abed664edbf kernel.org Patch 
https://git.kernel.org/stable/c/2b5dd4632966c39da6ba74dbc8689b309065e82c kernel.org Patch 
https://git.kernel.org/stable/c/796e0cac058252d0ad34ebe288e6f7979b5fc9b2 kernel.org Patch 
https://git.kernel.org/stable/c/8977fad2b3c6eefd414131168d597c5d1d5e1abf kernel.org Patch 
https://git.kernel.org/stable/c/aba4712e8f0381cd5d196534ce2ad082626a5ab6 kernel.org Patch 
https://git.kernel.org/stable/c/ff3d9e8f7244293e303f7b6ef70774291c7c27e9 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-667 Improper Locking cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-31629
NVD Published Date:
04/24/2026
NVD Last Modified:
04/27/2026
Source:
kernel.org