CVE-2025-39705
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix a Null pointer dereference vulnerability [Why] A null pointer dereference vulnerability exists in the AMD display driver's (DC module) cleanup function dc_destruct(). When display control context (dc->ctx) construction fails (due to memory allocation failure), this pointer remains NULL. During subsequent error handling when dc_destruct() is called, there's no NULL check before dereferencing the perf_trace member (dc->ctx->perf_trace), causing a kernel null pointer dereference crash. [How] Check if dc->ctx is non-NULL before dereferencing. (Updated commit text and removed unnecessary error message) (cherry picked from commit 9dd8e2ba268c636c240a918e0a31e6feaee19404)
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-05 18:15:47.690000
Last modified
2026-10-30 13:18:08.610000
View original CVE JSON
{
"id": "CVE-2025-39705",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-09-05T18:15:47.690",
"lastModified": "2026-10-30T13:18:08.610",
"vulnStatus": "Modified",
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix a Null pointer dereference vulnerability\n\n[Why]\nA null pointer dereference vulnerability exists in the AMD display driver's\n(DC module) cleanup function dc_destruct().\nWhen display control context (dc->ctx) construction fails\n(due to memory allocation failure), this pointer remains NULL.\nDuring subsequent error handling when dc_destruct() is called,\nthere's no NULL check before dereferencing the perf_trace member\n(dc->ctx->perf_trace), causing a kernel null pointer dereference crash.\n\n[How]\nCheck if dc->ctx is non-NULL before dereferencing.\n\n(Updated commit text and removed unnecessary error message)\n(cherry picked from commit 9dd8e2ba268c636c240a918e0a31e6feaee19404)"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/amd/display: solucionar una vulnerabilidad de desreferencia de puntero nulo\n\n[Por qué]\nExiste una vulnerabilidad de desreferencia de puntero nulo en la función de limpieza dc_destruct() del controlador de pantalla de AMD (módulo DC).\nCuando la construcción del contexto de control de pantalla (dc->ctx) falla (debido a un fallo en la asignación de memoria), este puntero permanece NULO.\nDurante el manejo de errores posterior, cuando se llama a dc_destruct(), no hay una verificación de NULO antes de desreferenciar el miembro perf_trace (dc->ctx->perf_trace), causando un fallo de desreferencia de puntero nulo del kernel.\n\n[Cómo]\nVerificar si dc->ctx no es NULO antes de desreferenciar.\n\n(Texto del commit actualizado y mensaje de error innecesario eliminado)\n(seleccionado de commit 9dd8e2ba268c636c240a918e0a31e6feaee19404)"
}
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"type": "Primary",
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"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
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"impactScore": 3.6
}
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"weaknesses": [
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"source": "[email protected]",
"type": "Primary",
"description": [
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"lang": "en",
"value": "CWE-476"
}
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"configurations": [
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