CVE-2026-90035 (GCVE-0-2026-90035)
Vulnerability from cvelistv5 – Published: 2026-09-16 10:33 – Updated: 2026-09-16 10:33
VLAI
EPSS
VEX
Title
drm/amd/display: fix division by zero in get_estimated_bw()
Summary
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.
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)
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8e5cfe547bf3beeb29d9608be68d22dff2b5012b , < 4c5b61b9df6ab33b55f228e1b6579cefad11a9f7
(git)
Affected: 8e5cfe547bf3beeb29d9608be68d22dff2b5012b , < ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a (git) Affected: 8e5cfe547bf3beeb29d9608be68d22dff2b5012b , < 4814f28c45f58a71a80d09b80a60da6a063b539a (git) Affected: 8e5cfe547bf3beeb29d9608be68d22dff2b5012b , < b08c3d5ee7feadd821208f7c2c1ec02a16ce5878 (git) Affected: 8e5cfe547bf3beeb29d9608be68d22dff2b5012b , < f63de9054da858d57054474c32464106f8375e0d (git) |
guessed | |
| Linux | Linux |
Affected:
6.3
Unaffected: 0 , < 6.3 (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.51 , ≤ 6.18.* (semver) Unaffected: 7.2.5 , ≤ 7.2.* (semver) Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "4c5b61b9df6ab33b55f228e1b6579cefad11a9f7",
"status": "affected",
"version": "8e5cfe547bf3beeb29d9608be68d22dff2b5012b",
"versionType": "git"
},
{
"lessThan": "ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a",
"status": "affected",
"version": "8e5cfe547bf3beeb29d9608be68d22dff2b5012b",
"versionType": "git"
},
{
"lessThan": "4814f28c45f58a71a80d09b80a60da6a063b539a",
"status": "affected",
"version": "8e5cfe547bf3beeb29d9608be68d22dff2b5012b",
"versionType": "git"
},
{
"lessThan": "b08c3d5ee7feadd821208f7c2c1ec02a16ce5878",
"status": "affected",
"version": "8e5cfe547bf3beeb29d9608be68d22dff2b5012b",
"versionType": "git"
},
{
"lessThan": "f63de9054da858d57054474c32464106f8375e0d",
"status": "affected",
"version": "8e5cfe547bf3beeb29d9608be68d22dff2b5012b",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.3"
},
{
"lessThan": "6.3",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3-rc2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.157",
"versionStartIncluding": "6.3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.110",
"versionStartIncluding": "6.3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.51",
"versionStartIncluding": "6.3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2.5",
"versionStartIncluding": "6.3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.3-rc2",
"versionStartIncluding": "6.3",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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-\u003edpia_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)"
}
],
"providerMetadata": {
"dateUpdated": "2026-09-16T10:33:35.281Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/4c5b61b9df6ab33b55f228e1b6579cefad11a9f7"
},
{
"url": "https://git.kernel.org/stable/c/ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a"
},
{
"url": "https://git.kernel.org/stable/c/4814f28c45f58a71a80d09b80a60da6a063b539a"
},
{
"url": "https://git.kernel.org/stable/c/b08c3d5ee7feadd821208f7c2c1ec02a16ce5878"
},
{
"url": "https://git.kernel.org/stable/c/f63de9054da858d57054474c32464106f8375e0d"
}
],
"title": "drm/amd/display: fix division by zero in get_estimated_bw()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-90035",
"datePublished": "2026-09-16T10:33:35.281Z",
"dateReserved": "2026-09-11T19:38:34.782Z",
"dateUpdated": "2026-09-16T10:33:35.281Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-90035\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-16T11:17:16.690\",\"lastModified\":\"2026-09-16T11:17:16.690\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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-\u003edpia_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)\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8e5cfe547bf3beeb29d9608be68d22dff2b5012b\",\"lessThan\":\"4c5b61b9df6ab33b55f228e1b6579cefad11a9f7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8e5cfe547bf3beeb29d9608be68d22dff2b5012b\",\"lessThan\":\"ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8e5cfe547bf3beeb29d9608be68d22dff2b5012b\",\"lessThan\":\"4814f28c45f58a71a80d09b80a60da6a063b539a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8e5cfe547bf3beeb29d9608be68d22dff2b5012b\",\"lessThan\":\"b08c3d5ee7feadd821208f7c2c1ec02a16ce5878\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8e5cfe547bf3beeb29d9608be68d22dff2b5012b\",\"lessThan\":\"f63de9054da858d57054474c32464106f8375e0d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.3\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.3\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.110\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.51\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.5\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"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\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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