CVE-2025-21735 NFC: nci: Add bounds checking in nci_hci_create_pipe()
A missing bounds check in the Linux kernel NFC driver allows remote attackers to trigger memory corruption, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-21735?
CVE-2025-21735 is a high-severity memory corruption vulnerability in Linux kernel, published on 27 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
NFC: nci: Add bounds checking in nci_hci_create_pipe()
The "pipe" variable is a u8 which comes from the network. If it's more than 127, then it results in memory corruption in the caller, nci_hci_connect_gate().
Weakness: CWE-787
Which versions are affected by CVE-2025-21735?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-21735?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-21735 being exploited?
There is no known exploitation of CVE-2025-21735 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-21735, DEBIAN-CVE-2025-21735, GHSA-63p9-c49j-px3q, ROOT-OS-UBUNTU-2404-CVE-2025-21735, UBUNTU-CVE-2025-21735.