In the Linux kernel, the following vulnerability has been resolved:
drm/hyperv: validate resolution_count and fix WIN8 fallback
A SYNTHVID_RESOLUTION_RESPONSE with resolution_count > 64 walks past the supported_resolution[SYNTHVID_MAX_RESOLUTION_COUNT] array in the parse loop. Bound resolution_count against the array size, folded into the existing zero-check.
When the WIN10 resolution probe fails, the caller in hyperv_connect_vsp() left hv->screen_*_max / preferred_* unpopulated, which sets mode_config.max_width / max_height to 0 and makes drm_internal_framebuffer_create() reject every userspace framebuffer with -EINVAL. The pre-WIN10 branch had the same gap for preferred_width / preferred_height. Use a single post-probe fallback guarded by screen_width_max == 0 so both paths converge on the WIN8 defaults.
CVSS Details
- CVSS 3.1 Base Score: 7.7
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 26, 2026 | Jul 26, 2026 |
| Redhat_linux | — | No solution exists | Aug 10, 2026 | Jul 25, 2026 |
| Ubuntu | — | Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-aws-64k-7.0Upgrade linux-image-awsUpgrade linux-image-aws-7.0Upgrade linux-image-raspi-7.0Upgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-nvidia-7.0Upgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-gcp-7.0Upgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-7.0.0-1009-awsUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-nvidiaUpgrade linux-image-gcp-64kUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-gcpUpgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-nvidia-bosUpgrade linux-image-nvidia-64kUpgrade linux-image-aws-64kUpgrade linux-image-raspi | Jul 28, 2026 | Jul 28, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 30, 2026 | Jul 25, 2026 |
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