CVE-2026-90286

drm/amdgpu/gfx6: Use PFP on the compute queues too

State: Published
Severity: 8.8 High
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu/gfx6: Use PFP on the compute queues too

On GFX6, the compute rings use the same CP path as the graphics ring. The only difference is that they don't support draw commands. (As opposed to GFX7 and newer which have a separate command parser that is called MEC for compute queues.)

This means that we have to take into consideration that the PFP also exists on compute queues on GFX6:

Use PFP for register writes on both graphics and compute queues.

In the pipeline sync, use the PFP to wait for the previous fence (and not the ME) to prevent the PFP from starting to execute the next submission while the ME is still in the previous submission.

After a VM flush, emit PFP_SYNC_ME on compute queues as well.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	2cd46ad22383ab8372b86cdb5257589496099412 to before f37211b9c01433f0bbb4709d25df7a0257cf915bAffected 2cd46ad22383ab8372b86cdb5257589496099412 to before 2aa869c6b23e0b1b7f39f762618852811d75deb9Affected 2cd46ad22383ab8372b86cdb5257589496099412 to before fbabc39b4f0fc771b00525ffd448be6a84355048Affected 2cd46ad22383ab8372b86cdb5257589496099412 to before b5d1d3e4519dc8f1b55d6b236848bed67b11a2e8Affected 2cd46ad22383ab8372b86cdb5257589496099412 to before e1d3018e3621c90cec070b6915836ae129656663Affected 2cd46ad22383ab8372b86cdb5257589496099412 to before 8d752f1bb73fabe5a425acbf5c767c0fe68bf3c5Affected 2cd46ad22383ab8372b86cdb5257589496099412 to before e399e9d7e291ccbeba6560fb8278c8d2aa744521Affected 2cd46ad22383ab8372b86cdb5257589496099412 to before 60f20946cd318518ddc2c0da12103c666b2b9564Affected
LinuxLinux	4.9Affected before 4.9Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

2cd46ad22383ab8372b86cdb5257589496099412 to before f37211b9c01433f0bbb4709d25df7a0257cf915bAffected
2cd46ad22383ab8372b86cdb5257589496099412 to before 2aa869c6b23e0b1b7f39f762618852811d75deb9Affected
2cd46ad22383ab8372b86cdb5257589496099412 to before fbabc39b4f0fc771b00525ffd448be6a84355048Affected
2cd46ad22383ab8372b86cdb5257589496099412 to before b5d1d3e4519dc8f1b55d6b236848bed67b11a2e8Affected
2cd46ad22383ab8372b86cdb5257589496099412 to before e1d3018e3621c90cec070b6915836ae129656663Affected
2cd46ad22383ab8372b86cdb5257589496099412 to before 8d752f1bb73fabe5a425acbf5c767c0fe68bf3c5Affected
2cd46ad22383ab8372b86cdb5257589496099412 to before e399e9d7e291ccbeba6560fb8278c8d2aa744521Affected
2cd46ad22383ab8372b86cdb5257589496099412 to before 60f20946cd318518ddc2c0da12103c666b2b9564Affected

LinuxLinux

4.9Affected
before 4.9Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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