CVE-2023-3863 Use-after-free in nfc_llcp_find_loca in net/nfc/llcp_core.c

What is CVE-2023-3863?

CVE-2023-3863 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 24 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A use-after-free flaw was found in nfc_llcp_find_local in net/nfc/llcp_core.c in NFC in the Linux kernel. This flaw allows a local user with special privileges to impact a kernel information leak issue.

Weakness: CWE-416

Which versions are affected by CVE-2023-3863?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2023-3863?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-3863 being exploited?

There is no known exploitation of CVE-2023-3863 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-27766, DEBIAN-CVE-2023-3863, GHSA-p4m9-r3rr-cx92, UBUNTU-CVE-2023-3863.