CVE-2026-43302

Kernel warning via unset V3D DMA segment limit

Published May 8, 2026 · Updated May 8, 2026

Incorrect DMA segment-size handling in the Linux Kernel V3D driver allows local users to trigger a kernel warning through V3D rendering. The driver leaves max_seg_size unset, so the DMA layer applies a 64 KB default while V3D buffer creation maps much larger scatter-gather segments and debug_dma_map_sg emits a warning. Reachability requires the V3D driver with CONFIG_DMA_API_DEBUG enabled; the published description does not establish a hang, crash, data disclosure, or data modification.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect DMA segment-size handling in the Linux Kernel V3D driver allows local users to trigger a kernel warning through V3D rendering. The driver leaves max_seg_size unset, so the DMA layer applies a 64 KB default while V3D buffer creation maps much larger scatter-gather segments and debug_dma_map_sg emits a warning. Reachability requires the V3D driver with CONFIG_DMA_API_DEBUG enabled; the published description does not establish a hang, crash, data disclosure, or data modification.

The record

CVE
CVE-2026-43302
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-131
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0290934d30abe7c88e18140fd5184c3f386b1e44
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <14d0d6c8b4504a60cfeea74775ab2e0164019e65
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <225023e3619b81af6d8d0e680503fc2d68633023
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2663ef70c6123b2232190f917275e5c3175f97d0
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9eb018828b1b30dfba689c060735c50fc5b9f704
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cf510785f74e74c54de40a43a955b7f844857487
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0290934d30abe7c88e18140fd5184c3f386b1e44; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <14d0d6c8b4504a60cfeea74775ab2e0164019e65; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <225023e3619b81af6d8d0e680503fc2d68633023; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2663ef70c6123b2232190f917275e5c3175f97d0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9eb018828b1b30dfba689c060735c50fc5b9f704; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cf510785f74e74c54de40a43a955b7f844857487; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-131Incorrect Calculation of Buffer Size

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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