CVE-2025-39807
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Add error handling for old state CRTC in atomic_disable Introduce error handling to address an issue where, after a hotplug event, the cursor continues to update. This situation can lead to a kernel panic due to accessing the NULL `old_state->crtc`. E,g. Unable to handle kernel NULL pointer dereference at virtual address Call trace: mtk_crtc_plane_disable+0x24/0x140 mtk_plane_atomic_update+0x8c/0xa8 drm_atomic_helper_commit_planes+0x114/0x2c8 drm_atomic_helper_commit_tail_rpm+0x4c/0x158 commit_tail+0xa0/0x168 drm_atomic_helper_commit+0x110/0x120 drm_atomic_commit+0x8c/0xe0 drm_atomic_helper_update_plane+0xd4/0x128 __setplane_atomic+0xcc/0x110 drm_mode_cursor_common+0x250/0x440 drm_mode_cursor_ioctl+0x44/0x70 drm_ioctl+0x264/0x5d8 __arm64_sys_ioctl+0xd8/0x510 invoke_syscall+0x6c/0xe0 do_el0_svc+0x68/0xe8 el0_svc+0x34/0x60 el0t_64_sync_handler+0x1c/0xf8 el0t_64_sync+0x180/0x188 Adding NULL pointer checks to ensure stability by preventing operations on an invalid CRTC state.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-16 13:15:51.783000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
{
"id": "CVE-2025-39807",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-09-16T13:15:51.783",
"lastModified": "2026-10-19T21:10:00.160",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Add error handling for old state CRTC in atomic_disable\n\nIntroduce error handling to address an issue where, after a hotplug\nevent, the cursor continues to update. This situation can lead to a\nkernel panic due to accessing the NULL `old_state->crtc`.\n\nE,g.\nUnable to handle kernel NULL pointer dereference at virtual address\nCall trace:\n mtk_crtc_plane_disable+0x24/0x140\n mtk_plane_atomic_update+0x8c/0xa8\n drm_atomic_helper_commit_planes+0x114/0x2c8\n drm_atomic_helper_commit_tail_rpm+0x4c/0x158\n commit_tail+0xa0/0x168\n drm_atomic_helper_commit+0x110/0x120\n drm_atomic_commit+0x8c/0xe0\n drm_atomic_helper_update_plane+0xd4/0x128\n __setplane_atomic+0xcc/0x110\n drm_mode_cursor_common+0x250/0x440\n drm_mode_cursor_ioctl+0x44/0x70\n drm_ioctl+0x264/0x5d8\n __arm64_sys_ioctl+0xd8/0x510\n invoke_syscall+0x6c/0xe0\n do_el0_svc+0x68/0xe8\n el0_svc+0x34/0x60\n el0t_64_sync_handler+0x1c/0xf8\n el0t_64_sync+0x180/0x188\n\nAdding NULL pointer checks to ensure stability by preventing operations\non an invalid CRTC state."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/mediatek: Añadir manejo de errores para el CRTC de estado antiguo en atomic_disable\n\nSe introduce el manejo de errores para abordar un problema donde, después de un evento de hotplug, el cursor continúa actualizándose. Esta situación puede llevar a un kernel panic debido al acceso al NULL 'old_state->crtc'.\n\nP.ej.\nNo se puede manejar la desreferencia de puntero NULL del kernel en la dirección virtual\nTraza de llamada:\n mtk_crtc_plane_disable+0x24/0x140\n mtk_plane_atomic_update+0x8c/0xa8\n drm_atomic_helper_commit_planes+0x114/0x2c8\n drm_atomic_helper_commit_tail_rpm+0x4c/0x158\n commit_tail+0xa0/0x168\n drm_atomic_helper_commit+0x110/0x120\n drm_atomic_commit+0x8c/0xe0\n drm_atomic_helper_update_plane+0xd4/0x128\n __setplane_atomic+0xcc/0x110\n drm_mode_cursor_common+0x250/0x440\n drm_mode_cursor_ioctl+0x44/0x70\n drm_ioctl+0x264/0x5d8\n __arm64_sys_ioctl+0xd8/0x510\n invoke_syscall+0x6c/0xe0\n do_el0_svc+0x68/0xe8\n el0_svc+0x34/0x60\n el0t_64_sync_handler+0x1c/0xf8\n el0t_64_sync+0x180/0x188\n\nAñadiendo comprobaciones de puntero NULL para asegurar la estabilidad al prevenir operaciones en un estado CRTC inválido."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/gpu/drm/mediatek/mtk_plane.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "40b5b4ba8ed87c0bfb6268c10589777652ebde4c",
"lessThan": "7d5cc22efa44e0fe321ce195c71c3d7da211fbb2",
"versionType": "git",
"status": "affected"
},
{
"version": "d208261e9f7c66960587b10473081dc1cecbe50b",
"lessThan": "9a94e9d8b50bcfe89693bc899a54d3866d86e973",
"versionType": "git",
"status": "affected"
},
{
"version": "d208261e9f7c66960587b10473081dc1cecbe50b",
"lessThan": "0c6b24d70da21201ed009a2aca740d2dfddc7ab5",
"versionType": "git",
"status": "affected"
},
{
"version": "a9c482689051ca96f4a4630fe49fd6919694caaa",
"versionType": "git",
"status": "affected"
},
{
"version": "6.12.40",
"lessThan": "6.12.45",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.15.8",
"lessThan": "6.16",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/gpu/drm/mediatek/mtk_plane.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.16",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.16",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.45",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.16.5",
"lessThanOrEqual": "6.16.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.17",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-01-14T18:14:18.395954Z",
"id": "CVE-2025-39807",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.12.40",
"versionEndExcluding": "6.12.45",
"matchCriteriaId": "27EAA6DF-512D-4E94-B38B-33571BB22DC1"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.15.8",
"versionEndExcluding": "6.16",
"matchCriteriaId": "EA66C243-6DF2-4727-A595-DD89F076A762"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.16.1",
"versionEndExcluding": "6.16.5",
"matchCriteriaId": "F0041731-3A53-4973-8102-994D933D57E8"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:-:*:*:*:*:*:*",
"matchCriteriaId": "6238B17D-C12B-458F-A138-97039BFC4595"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc7:*:*:*:*:*:*",
"matchCriteriaId": "7A9C2DE5-43B8-4D73-BDB5-EA55C7671A52"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*",
"matchCriteriaId": "327D22EF-390B-454C-BD31-2ED23C998A1C"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*",
"matchCriteriaId": "C730CD9A-D969-4A8E-9522-162AAF7C0EE9"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*",
"matchCriteriaId": "39982C4B-716E-4B2F-8196-FA301F47807D"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/0c6b24d70da21201ed009a2aca740d2dfddc7ab5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/7d5cc22efa44e0fe321ce195c71c3d7da211fbb2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/9a94e9d8b50bcfe89693bc899a54d3866d86e973",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
}
]
}