CVE-2026-90035
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: fix division by zero in get_estimated_bw()
get_estimated_bw() divides by link->dpia_bw_alloc_config.bw_granularity, which is zeroed by reset_bw_alloc_struct() and only populated once DP_TUNNELING_BW_ALLOC_CAP_CHANGED has been handled.
link_dp_dpia_handle_bw_alloc_status(), the DPCD interrupt handler, calls get_estimated_bw() whenever DP_TUNNELING_ESTIMATED_BW_CHANGED is set, independently of whether DP_TUNNELING_BW_ALLOC_CAP_CHANGED has ever fired for that link. A connected USB4/DPIA tunneling device that reports an estimated-bandwidth change before ever reporting a capability change drives a division by zero in this IRQ path.
Leer descripción completaMostrar menos
link_dpia_send_bw_alloc_request() already guards the same bw_granularity division; add the identical guard here rather than introducing a new pattern.
(cherry picked from commit f2a961457c33dc34223aad5c9e8971de34a4eed3)
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: 0.19%
- Percentil entre todas las CVEs puntuadas: 7
- Fecha de la puntuación: 5/10/2026
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/4814f28c45f58a71a80d09b80a60da6a063b539a
- https://git.kernel.org/stable/c/4c5b61b9df6ab33b55f228e1b6579cefad11a9f7
- https://git.kernel.org/stable/c/ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a
- https://git.kernel.org/stable/c/b08c3d5ee7feadd821208f7c2c1ec02a16ce5878
- https://git.kernel.org/stable/c/f63de9054da858d57054474c32464106f8375e0d
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-90035",
"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": "8e5cfe547bf3beeb29d9608be68d22dff2b5012b",
"lessThan": "4c5b61b9df6ab33b55f228e1b6579cefad11a9f7",
"versionType": "git"
},
{
"status": "affected",
"version": "8e5cfe547bf3beeb29d9608be68d22dff2b5012b",
"lessThan": "ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a",
"versionType": "git"
},
{
"status": "affected",
"version": "8e5cfe547bf3beeb29d9608be68d22dff2b5012b",
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"versionType": "git"
},
{
"status": "affected",
"version": "8e5cfe547bf3beeb29d9608be68d22dff2b5012b",
"lessThan": "b08c3d5ee7feadd821208f7c2c1ec02a16ce5878",
"versionType": "git"
},
{
"status": "affected",
"version": "8e5cfe547bf3beeb29d9608be68d22dff2b5012b",
"lessThan": "f63de9054da858d57054474c32464106f8375e0d",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-16T11:17:16.690",
"references": [
{
"url": "https://git.kernel.org/stable/c/4814f28c45f58a71a80d09b80a60da6a063b539a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4c5b61b9df6ab33b55f228e1b6579cefad11a9f7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b08c3d5ee7feadd821208f7c2c1ec02a16ce5878",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f63de9054da858d57054474c32464106f8375e0d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix division by zero in get_estimated_bw()\n\nget_estimated_bw() divides by link->dpia_bw_alloc_config.bw_granularity,\nwhich is zeroed by reset_bw_alloc_struct() and only populated once\nDP_TUNNELING_BW_ALLOC_CAP_CHANGED has been handled.\n\nlink_dp_dpia_handle_bw_alloc_status(), the DPCD interrupt handler,\ncalls get_estimated_bw() whenever DP_TUNNELING_ESTIMATED_BW_CHANGED\nis set, independently of whether DP_TUNNELING_BW_ALLOC_CAP_CHANGED\nhas ever fired for that link. A connected USB4/DPIA tunneling device\nthat reports an estimated-bandwidth change before ever reporting a\ncapability change drives a division by zero in this IRQ path.\n\nlink_dpia_send_bw_alloc_request() already guards the same\nbw_granularity division; add the identical guard here rather than\nintroducing a new pattern.\n\n(cherry picked from commit f2a961457c33dc34223aad5c9e8971de34a4eed3)"
}
],
"lastModified": "2026-09-16T11:17:16.690",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}