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

Vulnerability from cvelistv5 – Published: 2026-05-01 14:15 – Updated: 2026-05-11 22:15
VLAI
Title
accel/qaic: Handle DBC deactivation if the owner went away
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < 2dd67966f39a2abf8ccb4865031c722e40e01b7f (git)
Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < 08021f2d4a557d6491e3bcc288e96425f50aa3cf (git)
Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < f403094d9075d7c565a3d81002b781c325cb3c07 (git)
Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < ee0180e77e6c8482644569632065411de844c515 (git)
Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < 2feec5ae5df785658924ab6bd91280dc3926507c (git)
guessed Create a notification for this product.
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)
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Show details on NVD website
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    "redhat_vex": {
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      "cve": "CVE-2026-43007",
      "id": "CVE-2026-43007",
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      "title": "kernel: accel/qaic: Handle DBC deactivation if the owner went away",
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      "version": "3"
    },
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      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T17:11:46Z",
      "cve": "CVE-2026-43007",
      "id": "CVE-2026-43007",
      "initial_release_date": "2026-05-06T01:41:31Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "424",
      "product_status:known_not_affected": "292",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43007",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43007.json",
      "version": "7"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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