ghsa-6r88-fjqw-x66f
Vulnerability from github
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.
{
"affected": [],
"aliases": [
"CVE-2025-68184"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-16T14:15:50Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Disable AFBC support on Mediatek DRM driver\n\nCommit c410fa9b07c3 (\"drm/mediatek: Add AFBC support to Mediatek DRM\ndriver\") added AFBC support to Mediatek DRM and enabled the\n32x8/split/sparse modifier.\n\nHowever, this is currently broken on Mediatek MT8188 (Genio 700 EVK\nplatform); tested using upstream Kernel and Mesa (v25.2.1), AFBC is used by\ndefault since Mesa v25.0.\n\nKernel trace reports vblank timeouts constantly, and the render is garbled:\n\n```\n[CRTC:62:crtc-0] vblank wait timed out\nWARNING: CPU: 7 PID: 70 at drivers/gpu/drm/drm_atomic_helper.c:1835 drm_atomic_helper_wait_for_vblanks.part.0+0x24c/0x27c\n[...]\nHardware name: MediaTek Genio-700 EVK (DT)\nWorkqueue: events_unbound commit_work\npstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : drm_atomic_helper_wait_for_vblanks.part.0+0x24c/0x27c\nlr : drm_atomic_helper_wait_for_vblanks.part.0+0x24c/0x27c\nsp : ffff80008337bca0\nx29: ffff80008337bcd0 x28: 0000000000000061 x27: 0000000000000000\nx26: 0000000000000001 x25: 0000000000000000 x24: ffff0000c9dcc000\nx23: 0000000000000001 x22: 0000000000000000 x21: ffff0000c66f2f80\nx20: ffff0000c0d7d880 x19: 0000000000000000 x18: 000000000000000a\nx17: 000000040044ffff x16: 005000f2b5503510 x15: 0000000000000000\nx14: 0000000000000000 x13: 74756f2064656d69 x12: 742074696177206b\nx11: 0000000000000058 x10: 0000000000000018 x9 : ffff800082396a70\nx8 : 0000000000057fa8 x7 : 0000000000000cce x6 : ffff8000823eea70\nx5 : ffff0001fef5f408 x4 : ffff80017ccee000 x3 : ffff0000c12cb480\nx2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c12cb480\nCall trace:\n drm_atomic_helper_wait_for_vblanks.part.0+0x24c/0x27c (P)\n drm_atomic_helper_commit_tail_rpm+0x64/0x80\n commit_tail+0xa4/0x1a4\n commit_work+0x14/0x20\n process_one_work+0x150/0x290\n worker_thread+0x2d0/0x3ec\n kthread+0x12c/0x210\n ret_from_fork+0x10/0x20\n---[ end trace 0000000000000000 ]---\n```\n\nUntil this gets fixed upstream, disable AFBC support on this platform, as\nit\u0027s currently broken with upstream Mesa.",
"id": "GHSA-6r88-fjqw-x66f",
"modified": "2025-12-16T15:30:44Z",
"published": "2025-12-16T15:30:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68184"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0eaa0a3dfe218c4cf1a0782ccbbc9e3931718f17"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/72223700b620885d556a4c52a63f5294316176c6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9882a40640036d5bbc590426a78981526d4f2345"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/df1ad5de2197ea1b527d13ae7b699e9ee7d724d4"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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