CVE-2025-68184
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-16

Last updated on: 2025-12-18

Assigner: kernel.org

Description
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.
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Meta Information
Published
2025-12-16
Last Modified
2025-12-18
Generated
2026-05-07
AI Q&A
2025-12-16
EPSS Evaluated
2026-05-05
NVD
CVE-2025-68184
EUVD
EUVD-2025-203712
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
mesa mesa 25.2.1
mesa mesa 25.0
mediatek drm_driver *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability involves the AFBC (Arm Frame Buffer Compression) support added to the Mediatek DRM driver in the Linux kernel. The AFBC support, introduced in a specific commit, is broken on the Mediatek MT8188 platform, causing constant vblank timeouts and garbled rendering. This means the graphics display can fail or behave incorrectly due to this broken feature. The issue is currently mitigated by disabling AFBC support on this platform until a proper fix is available upstream.


How can this vulnerability impact me? :

The impact of this vulnerability is primarily on the graphical display functionality of devices using the Mediatek MT8188 platform with the affected Linux kernel and Mesa versions. Users may experience constant vblank timeouts and garbled rendering, which can lead to display instability or failure. This can affect the usability and reliability of the device's graphical interface.


How can this vulnerability be detected on my network or system? Can you suggest some commands?

This vulnerability can be detected by observing kernel trace logs for vblank timeout errors and garbled rendering on Mediatek MT8188 platforms. Specifically, look for messages like '[CRTC:62:crtc-0] vblank wait timed out' and warnings related to drm_atomic_helper_wait_for_vblanks in the kernel logs. You can check the kernel logs using commands such as 'dmesg | grep drm' or 'journalctl -k | grep drm' to identify these errors.


What immediate steps should I take to mitigate this vulnerability?

The immediate mitigation is to disable AFBC support on the Mediatek DRM driver for the affected platform (Mediatek MT8188 / Genio 700 EVK) until an upstream fix is available. This prevents the broken AFBC functionality from causing vblank timeouts and rendering issues.


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