CVE-2026-98309
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
drm/vc4: Use managed KMS polling to fix UAF on unbind
vc4_kms_load() calls drm_kms_helper_poll_init() but the driver provides no matching drm_kms_helper_poll_fini(). The output poll work stays scheduled after unbind and runs on the freed drm_device:
Use drmm_kms_helper_poll_init() so polling is finalized with the device, as other drivers do.
Detalles técnicos trazas, registros y código del informe original
# modprobe vc4; rmmod vc4; sleep 10 BUG: KASAN: slab-use-after-free in delayed_work_timer_fn BUG: KASAN: slab-use-after-free in drm_client_dev_hotplug [drm] Workqueue: events output_poll_execute [drm_kms_helper] Allocated by task 171: __devm_drm_dev_alloc Freed by task 262 (rmmod): drm_dev_put / component_del
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 6
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/073a30d75f309812ed61af134f24ffef4107b13a
- https://git.kernel.org/stable/c/7f9780df677370a19b4ec9764f13b1b82073e0d9
- https://git.kernel.org/stable/c/b6beee927e7f4e3142032ff91b2d0417cdddc0f6
- https://git.kernel.org/stable/c/cf0c4432bda37b02e7d430ff5017228ceb7caf0c
- https://git.kernel.org/stable/c/ee507691c18f9fee5d4751e295ab9a7ff31d59ae
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-98309",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
"lessThan": "b6beee927e7f4e3142032ff91b2d0417cdddc0f6",
"versionType": "git"
},
{
"status": "affected",
"version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
"lessThan": "cf0c4432bda37b02e7d430ff5017228ceb7caf0c",
"versionType": "git"
},
{
"status": "affected",
"version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
"lessThan": "ee507691c18f9fee5d4751e295ab9a7ff31d59ae",
"versionType": "git"
},
{
"status": "affected",
"version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
"lessThan": "7f9780df677370a19b4ec9764f13b1b82073e0d9",
"versionType": "git"
},
{
"status": "affected",
"version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
"lessThan": "073a30d75f309812ed61af134f24ffef4107b13a",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/vc4/vc4_kms.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc4",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/vc4/vc4_kms.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-06T09:18:22.300",
"references": [
{
"url": "https://git.kernel.org/stable/c/073a30d75f309812ed61af134f24ffef4107b13a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7f9780df677370a19b4ec9764f13b1b82073e0d9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b6beee927e7f4e3142032ff91b2d0417cdddc0f6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cf0c4432bda37b02e7d430ff5017228ceb7caf0c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ee507691c18f9fee5d4751e295ab9a7ff31d59ae",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: Use managed KMS polling to fix UAF on unbind\n\nvc4_kms_load() calls drm_kms_helper_poll_init() but the driver provides\nno matching drm_kms_helper_poll_fini(). The output poll work stays\nscheduled after unbind and runs on the freed drm_device:\n\n # modprobe vc4; rmmod vc4; sleep 10\n BUG: KASAN: slab-use-after-free in delayed_work_timer_fn\n BUG: KASAN: slab-use-after-free in drm_client_dev_hotplug [drm]\n Workqueue: events output_poll_execute [drm_kms_helper]\n Allocated by task 171: __devm_drm_dev_alloc\n Freed by task 262 (rmmod): drm_dev_put / component_del\n\nUse drmm_kms_helper_poll_init() so polling is finalized with the device,\nas other drivers do."
}
],
"lastModified": "2026-10-06T09:18:22.300",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}