Vulnerability-Lookup

FKIE_CVE-2026-43007

Vulnerability from fkie_nvd - Published: 2026-05-01 15:16 - Updated: 2026-05-07 20:24

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: accel/qaic: Handle DBC deactivation if the owner went away When a DBC is released, the device sends a QAIC_TRANS_DEACTIVATE_FROM_DEV transaction to the host over the QAIC_CONTROL MHI channel. QAIC handles this by calling decode_deactivate() to release the resources allocated for that DBC. Since that handling is done in the qaic_manage_ioctl() context, if the user goes away before receiving and handling the deactivation, the host will be out-of-sync with the DBCs available for use, and the DBC resources will not be freed unless the device is removed. If another user loads and requests to activate a network, then the device assigns the same DBC to that network, QAIC will "indefinitely" wait for dbc->in_use = false, leading the user process to hang. As a solution to this, handle QAIC_TRANS_DEACTIVATE_FROM_DEV transactions that are received after the user has gone away.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/08021f2d4a557d6491e3bcc288e96425f50aa3cf	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2dd67966f39a2abf8ccb4865031c722e40e01b7f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2feec5ae5df785658924ab6bd91280dc3926507c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ee0180e77e6c8482644569632065411de844c515	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f403094d9075d7c565a3d81002b781c325cb3c07	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/qaic: Handle DBC deactivation if the owner went away\n\nWhen a DBC is released, the device sends a QAIC_TRANS_DEACTIVATE_FROM_DEV\ntransaction to the host over the QAIC_CONTROL MHI channel. QAIC handles\nthis by calling decode_deactivate() to release the resources allocated for\nthat DBC. Since that handling is done in the qaic_manage_ioctl() context,\nif the user goes away before receiving and handling the deactivation, the\nhost will be out-of-sync with the DBCs available for use, and the DBC\nresources will not be freed unless the device is removed. If another user\nloads and requests to activate a network, then the device assigns the same\nDBC to that network, QAIC will \"indefinitely\" wait for dbc-\u003ein_use = false,\nleading the user process to hang.\n\nAs a solution to this, handle QAIC_TRANS_DEACTIVATE_FROM_DEV transactions\nthat are received after the user has gone away."
    }
  ],
  "id": "CVE-2026-43007",
  "lastModified": "2026-05-07T20:24:32.047",
  "metrics": {
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          "attackComplexity": "LOW",
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          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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  "published": "2026-05-01T15:16:44.553",
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  "vulnStatus": "Analyzed",
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          "lang": "en",
          "value": "CWE-415"
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-43007 (GCVE-0-2026-43007)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:15 – Updated: 2026-05-11 22:15

Title

accel/qaic: Handle DBC deactivation if the owner went away

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/2dd67966f39a2abf8…
https://git.kernel.org/stable/c/08021f2d4a557d649…
https://git.kernel.org/stable/c/f403094d9075d7c56…
https://git.kernel.org/stable/c/ee0180e77e6c84826…
https://git.kernel.org/stable/c/2feec5ae5df785658…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < 2dd67966f39a2abf8ccb4865031c722e40e01b7f (git) Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < 08021f2d4a557d6491e3bcc288e96425f50aa3cf (git) Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < f403094d9075d7c565a3d81002b781c325cb3c07 (git) Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < ee0180e77e6c8482644569632065411de844c515 (git) Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < 2feec5ae5df785658924ab6bd91280dc3926507c (git)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.134 , ≤ 6.6.* (semver) Unaffected: 6.12.81 , ≤ 6.12.* (semver) Unaffected: 6.18.22 , ≤ 6.18.* (semver) Unaffected: 6.19.12 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "programFiles": [
            "drivers/accel/qaic/qaic_control.c"
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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.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43007

CVE-2026-43007 (GCVE-0-2026-43007)

Tags

Sightings

Nomenclature