GHSA-W4GG-V9H7-G2VH
Vulnerability from github – Published: 2025-12-16 18:31 – Updated: 2026-07-30 06:32In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Check NULL before accessing
[WHAT] IGT kms_cursor_legacy's long-nonblocking-modeset-vs-cursor-atomic fails with NULL pointer dereference. This can be reproduced with both an eDP panel and a DP monitors connected.
BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 13 UID: 0 PID: 2960 Comm: kms_cursor_lega Not tainted 6.16.0-99-custom #8 PREEMPT(voluntary) Hardware name: AMD ........ RIP: 0010:dc_stream_get_scanoutpos+0x34/0x130 [amdgpu] Code: 57 4d 89 c7 41 56 49 89 ce 41 55 49 89 d5 41 54 49 89 fc 53 48 83 ec 18 48 8b 87 a0 64 00 00 48 89 75 d0 48 c7 c6 e0 41 30 c2 <48> 8b 38 48 8b 9f 68 06 00 00 e8 8d d7 fd ff 31 c0 48 81 c3 e0 02 RSP: 0018:ffffd0f3c2bd7608 EFLAGS: 00010292 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffd0f3c2bd7668 RDX: ffffd0f3c2bd7664 RSI: ffffffffc23041e0 RDI: ffff8b32494b8000 RBP: ffffd0f3c2bd7648 R08: ffffd0f3c2bd766c R09: ffffd0f3c2bd7760 R10: ffffd0f3c2bd7820 R11: 0000000000000000 R12: ffff8b32494b8000 R13: ffffd0f3c2bd7664 R14: ffffd0f3c2bd7668 R15: ffffd0f3c2bd766c FS: 000071f631b68700(0000) GS:ffff8b399f114000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001b8105000 CR4: 0000000000f50ef0 PKRU: 55555554 Call Trace: dm_crtc_get_scanoutpos+0xd7/0x180 [amdgpu] amdgpu_display_get_crtc_scanoutpos+0x86/0x1c0 [amdgpu] ? __pfx_amdgpu_crtc_get_scanout_position+0x10/0x10[amdgpu] amdgpu_crtc_get_scanout_position+0x27/0x50 [amdgpu] drm_crtc_vblank_helper_get_vblank_timestamp_internal+0xf7/0x400 drm_crtc_vblank_helper_get_vblank_timestamp+0x1c/0x30 drm_crtc_get_last_vbltimestamp+0x55/0x90 drm_crtc_next_vblank_start+0x45/0xa0 drm_atomic_helper_wait_for_fences+0x81/0x1f0 ...
(cherry picked from commit 621e55f1919640acab25383362b96e65f2baea3c)
{
"affected": [],
"aliases": [
"CVE-2025-68286"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-16T16:16:07Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Check NULL before accessing\n\n[WHAT]\nIGT kms_cursor_legacy\u0027s long-nonblocking-modeset-vs-cursor-atomic\nfails with NULL pointer dereference. This can be reproduced with\nboth an eDP panel and a DP monitors connected.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] SMP NOPTI\n CPU: 13 UID: 0 PID: 2960 Comm: kms_cursor_lega Not tainted\n6.16.0-99-custom #8 PREEMPT(voluntary)\n Hardware name: AMD ........\n RIP: 0010:dc_stream_get_scanoutpos+0x34/0x130 [amdgpu]\n Code: 57 4d 89 c7 41 56 49 89 ce 41 55 49 89 d5 41 54 49\n 89 fc 53 48 83 ec 18 48 8b 87 a0 64 00 00 48 89 75 d0 48 c7 c6 e0 41 30\n c2 \u003c48\u003e 8b 38 48 8b 9f 68 06 00 00 e8 8d d7 fd ff 31 c0 48 81 c3 e0 02\n RSP: 0018:ffffd0f3c2bd7608 EFLAGS: 00010292\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffd0f3c2bd7668\n RDX: ffffd0f3c2bd7664 RSI: ffffffffc23041e0 RDI: ffff8b32494b8000\n RBP: ffffd0f3c2bd7648 R08: ffffd0f3c2bd766c R09: ffffd0f3c2bd7760\n R10: ffffd0f3c2bd7820 R11: 0000000000000000 R12: ffff8b32494b8000\n R13: ffffd0f3c2bd7664 R14: ffffd0f3c2bd7668 R15: ffffd0f3c2bd766c\n FS: 000071f631b68700(0000) GS:ffff8b399f114000(0000)\nknlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000000 CR3: 00000001b8105000 CR4: 0000000000f50ef0\n PKRU: 55555554\n Call Trace:\n \u003cTASK\u003e\n dm_crtc_get_scanoutpos+0xd7/0x180 [amdgpu]\n amdgpu_display_get_crtc_scanoutpos+0x86/0x1c0 [amdgpu]\n ? __pfx_amdgpu_crtc_get_scanout_position+0x10/0x10[amdgpu]\n amdgpu_crtc_get_scanout_position+0x27/0x50 [amdgpu]\n drm_crtc_vblank_helper_get_vblank_timestamp_internal+0xf7/0x400\n drm_crtc_vblank_helper_get_vblank_timestamp+0x1c/0x30\n drm_crtc_get_last_vbltimestamp+0x55/0x90\n drm_crtc_next_vblank_start+0x45/0xa0\n drm_atomic_helper_wait_for_fences+0x81/0x1f0\n ...\n\n(cherry picked from commit 621e55f1919640acab25383362b96e65f2baea3c)",
"id": "GHSA-w4gg-v9h7-g2vh",
"modified": "2026-07-30T06:32:24Z",
"published": "2025-12-16T18:31:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68286"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/09092269cb762378ca8b56024746b1a136761e0d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/109e9c92543f3105e8e1efd2c5e6b92ef55d5743"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3ce62c189693e8ed7b3abe551802bbc67f3ace54"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/62150f1e7ec707da76ff353fb7db51fef9cd6557"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/781f2f32e9c19eb791b52af283c96f9a9677a7f2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9d1a65cbe3ec5da3003c8434ac7a38dcdc958fd9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f7cf491cd5b54b5a093bd3fdf76fa2860a7522bf"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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