In the Linux kernel, the following vulnerability has been resolved:
drm/mediatek: Disable AFBC support on Mediatek DRM driver
Commit c410fa9b07c3 ("drm/mediatek: Add AFBC support to Mediatek DRM driver") added AFBC support to Mediatek DRM and enabled the 32x8/split/sparse modifier.
However, this is currently broken on Mediatek MT8188 (Genio 700 EVK platform); tested using upstream Kernel and Mesa (v25.2.1), AFBC is used by default since Mesa v25.0.
Kernel trace reports vblank timeouts constantly, and the render is garbled:
``` [CRTC:62:crtc-0] vblank wait timed out WARNING: CPU: 7 PID: 70 at drivers/gpu/drm/drm_atomic_helper.c:1835 drm_atomic_helper_wait_for_vblanks.part.0+0x24c/0x27c [...] Hardware name: MediaTek Genio-700 EVK (DT) Workqueue: events_unbound commit_work pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : drm_atomic_helper_wait_for_vblanks.part.0+0x24c/0x27c lr : drm_atomic_helper_wait_for_vblanks.part.0+0x24c/0x27c sp : ffff80008337bca0 x29: ffff80008337bcd0 x28: 0000000000000061 x27: 0000000000000000 x26: 0000000000000001 x25: 0000000000000000 x24: ffff0000c9dcc000 x23: 0000000000000001 x22: 0000000000000000 x21: ffff0000c66f2f80 x20: ffff0000c0d7d880 x19: 0000000000000000 x18: 000000000000000a x17: 000000040044ffff x16: 005000f2b5503510 x15: 0000000000000000 x14: 0000000000000000 x13: 74756f2064656d69 x12: 742074696177206b x11: 0000000000000058 x10: 0000000000000018 x9 : ffff800082396a70 x8 : 0000000000057fa8 x7 : 0000000000000cce x6 : ffff8000823eea70 x5 : ffff0001fef5f408 x4 : ffff80017ccee000 x3 : ffff0000c12cb480 x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c12cb480 Call trace: drm_atomic_helper_wait_for_vblanks.part.0+0x24c/0x27c (P) drm_atomic_helper_commit_tail_rpm+0x64/0x80 commit_tail+0xa4/0x1a4 commit_work+0x14/0x20 process_one_work+0x150/0x290 worker_thread+0x2d0/0x3ec kthread+0x12c/0x210 ret_from_fork+0x10/0x20 ---[ end trace 0000000000000000 ]--- ```
Until this gets fixed upstream, disable AFBC support on this platform, as it's currently broken with upstream Mesa.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Ubuntu | — | Upgrade linux-image-gke-64k-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-6.17.0-1008-raspiUpgrade linux-image-gcp-64kUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gkeUpgrade linux-image-xilinx-6.8Upgrade linux-image-aws-fipsUpgrade linux-image-6.17.0-1007-oracle-64kUpgrade linux-image-aws-6.17Upgrade linux-image-gcp-6.17Upgrade linux-image-oem-6.17Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-1052-gcpUpgrade linux-image-generic-64k-6.17Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-kvmUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-raspi-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-lowlatency-6.8Upgrade linux-image-6.8.0-1050-aws-fipsUpgrade linux-image-intel-iotgUpgrade linux-image-virtual-6.8Upgrade linux-image-gke-6.8Upgrade linux-image-6.8.0-106-fipsUpgrade linux-image-awsUpgrade linux-image-realtime-6.17Upgrade linux-image-gke-64kUpgrade linux-image-oracle-64k-6.17Upgrade linux-image-6.8.0-1047-oracleUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-aws-64k-6.17Upgrade linux-image-6.8.0-2040-raspi-realtimeUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oem-22.04dUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-6.8.0-1049-nvidia-lowlatencyUpgrade linux-image-6.8.0-1050-aws-64kUpgrade linux-image-6.8.0-1049-nvidia-64kUpgrade linux-image-oracle-6.17Upgrade linux-image-6.17.0-14-genericUpgrade linux-image-6.8.0-1049-nvidiaUpgrade linux-image-realtimeUpgrade linux-image-oracle-6.8Upgrade linux-image-gcp-6.8Upgrade linux-image-oracleUpgrade linux-image-6.8.0-1029-xilinxUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-6.8.0-1052-azure-fipsUpgrade linux-image-aws-fips-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.8.0-1052-gcp-fipsUpgrade linux-image-6.8.0-1049-nvidia-lowlatency-64kUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-gcp-64k-6.17Upgrade linux-image-6.8.0-106-lowlatencyUpgrade linux-image-6.8.0-106-lowlatency-64kUpgrade linux-image-realtime-6.8.1Upgrade linux-image-azure-6.8Upgrade linux-image-azureUpgrade linux-image-6.8.0-106-generic-64kUpgrade linux-image-aws-64kUpgrade linux-image-raspiUpgrade linux-image-virtual-6.17Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-generic-6.8Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-fips-6.8Upgrade linux-image-oem-22.04cUpgrade linux-image-azure-fipsUpgrade linux-image-ibm-6.8Upgrade linux-image-gcp-fipsUpgrade linux-image-gcpUpgrade linux-image-azure-fips-6.8Upgrade linux-image-6.17.0-1008-azureUpgrade linux-image-6.8.0-1047-oracle-64kUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-6.17.0-1011-oemUpgrade linux-image-6.17.0-1007-oracleUpgrade linux-image-6.8.0-1048-gkeUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-virtualUpgrade linux-image-aws-64k-6.8Upgrade linux-image-generic-64kUpgrade linux-image-genericUpgrade linux-image-xilinxUpgrade linux-image-oem-22.04aUpgrade linux-image-6.8.1-1045-realtimeUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-generic-6.17Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-raspi-6.17Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-ibmUpgrade linux-image-gkeopUpgrade linux-image-generic-64k-6.8Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1052-gcp-64kUpgrade linux-image-6.8.0-1049-ibmUpgrade linux-image-6.17.0-1007-gcp-64kUpgrade linux-image-6.17.0-1007-awsUpgrade linux-image-6.17.0-1007-aws-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1035-gkeopUpgrade linux-image-aws-6.8Upgrade linux-image-oracle-64kUpgrade linux-image-nvidiaUpgrade linux-image-gkeop-6.8Upgrade linux-image-fipsUpgrade linux-image-azure-lts-24.04Upgrade linux-image-azure-6.17Upgrade linux-image-6.8.0-106-genericUpgrade linux-image-6.8.0-1051-azureUpgrade linux-image-6.8.0-1050-awsUpgrade linux-image-6.17.0-1007-gcpUpgrade linux-image-6.17.0-14-generic-64kUpgrade linux-image-6.17.0-1006-realtimeUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1050-raspiUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-1048-gke-64k | Feb 13, 2026 | Feb 12, 2026 |
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