CVE-2026-43381 (GCVE-0-2026-43381)
Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-11 22:23
VLAI
EPSS
VEX
Title
nouveau/dpcd: return EBUSY for aux xfer if the device is asleep
Summary
In the Linux kernel, the following vulnerability has been resolved:
nouveau/dpcd: return EBUSY for aux xfer if the device is asleep
If we have runtime suspended, and userspace wants to use /dev/drm_dp_*
then just tell it the device is busy instead of crashing in the GSP
code.
WARNING: CPU: 2 PID: 565741 at drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c:164 r535_gsp_msgq_wait+0x9a/0xb0 [nouveau]
CPU: 2 UID: 0 PID: 565741 Comm: fwupd Not tainted 6.18.10-200.fc43.x86_64 #1 PREEMPT(lazy)
Hardware name: LENOVO 20QTS0PQ00/20QTS0PQ00, BIOS N2OET65W (1.52 ) 08/05/2024
RIP: 0010:r535_gsp_msgq_wait+0x9a/0xb0 [nouveau]
This is a simple fix to get backported. We should probably engineer a
proper power domain solution to wake up devices and keep them awake
while fw updates are happening.
Severity
5.5 (Medium)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8894f4919bc43f821775db2cfff4b917871b2102 , < 178df7c91e6c202579284df9f79d1592a514cdcf
(git)
Affected: 8894f4919bc43f821775db2cfff4b917871b2102 , < 4df518aa196085909fd7e32518ecd27fba60ed69 (git) Affected: 8894f4919bc43f821775db2cfff4b917871b2102 , < cd24cab2023aa46b595bc6b9cc39d8973d9d0a8c (git) Affected: 8894f4919bc43f821775db2cfff4b917871b2102 , < fad178ae894930520519ead3c8e0150641466360 (git) Affected: 8894f4919bc43f821775db2cfff4b917871b2102 , < 6bdd2d70c338d52c387d3b3aadc596784ae81b01 (git) Affected: 8894f4919bc43f821775db2cfff4b917871b2102 , < ad8fa5bff53f5d1f8394f996850da8ce070eaee3 (git) Affected: 8894f4919bc43f821775db2cfff4b917871b2102 , < 24639553a016578222ac597db924dfb6fa5ec8b5 (git) Affected: 8894f4919bc43f821775db2cfff4b917871b2102 , < 8f3c6f08ababad2e3bdd239728cf66a9949446b4 (git) |
guessed | |
| Linux | Linux |
Affected:
3.16
Unaffected: 0 , < 3.16 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed |
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnouveau/dpcd: return EBUSY for aux xfer if the device is asleep\n\nIf we have runtime suspended, and userspace wants to use /dev/drm_dp_*\nthen just tell it the device is busy instead of crashing in the GSP\ncode.\n\nWARNING: CPU: 2 PID: 565741 at drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c:164 r535_gsp_msgq_wait+0x9a/0xb0 [nouveau]\nCPU: 2 UID: 0 PID: 565741 Comm: fwupd Not tainted 6.18.10-200.fc43.x86_64 #1 PREEMPT(lazy)\nHardware name: LENOVO 20QTS0PQ00/20QTS0PQ00, BIOS N2OET65W (1.52 ) 08/05/2024\nRIP: 0010:r535_gsp_msgq_wait+0x9a/0xb0 [nouveau]\n\nThis is a simple fix to get backported. We should probably engineer a\nproper power domain solution to wake up devices and keep them awake\nwhile fw updates are happening."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T22:23:29.324Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/178df7c91e6c202579284df9f79d1592a514cdcf"
},
{
"url": "https://git.kernel.org/stable/c/4df518aa196085909fd7e32518ecd27fba60ed69"
},
{
"url": "https://git.kernel.org/stable/c/cd24cab2023aa46b595bc6b9cc39d8973d9d0a8c"
},
{
"url": "https://git.kernel.org/stable/c/fad178ae894930520519ead3c8e0150641466360"
},
{
"url": "https://git.kernel.org/stable/c/6bdd2d70c338d52c387d3b3aadc596784ae81b01"
},
{
"url": "https://git.kernel.org/stable/c/ad8fa5bff53f5d1f8394f996850da8ce070eaee3"
},
{
"url": "https://git.kernel.org/stable/c/24639553a016578222ac597db924dfb6fa5ec8b5"
},
{
"url": "https://git.kernel.org/stable/c/8f3c6f08ababad2e3bdd239728cf66a9949446b4"
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],
"title": "nouveau/dpcd: return EBUSY for aux xfer if the device is asleep",
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}
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"cveMetadata": {
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"cveId": "CVE-2026-43381",
"datePublished": "2026-05-08T14:21:29.340Z",
"dateReserved": "2026-05-01T14:12:56.006Z",
"dateUpdated": "2026-05-11T22:23:29.324Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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"date": "2026-09-14",
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"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-28T11:47:25+00:00",
"cve": "CVE-2026-43381",
"id": "CVE-2026-43381",
"initial_release_date": "2026-05-08T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: nouveau/dpcd: return EBUSY for aux xfer if the device is asleep",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43381.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T01:18:06Z",
"cve": "CVE-2026-43381",
"id": "CVE-2026-43381",
"initial_release_date": "2026-05-13T03:34:38Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "699",
"product_status:known_not_affected": "21",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-43381",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43381.json",
"version": "9"
}
}
}
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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.
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.
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