CVE-2026-43007 (GCVE-0-2026-43007)
Vulnerability from cvelistv5 – Published: 2026-05-01 14:15 – Updated: 2026-05-11 22:15
VLAI
EPSS
VEX
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)
Assigner
References
Impacted products
2 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 | |
| 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) |
guessed |
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"current_release_date": "2026-06-28T07:34:34+00:00",
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"id": "CVE-2026-43007",
"initial_release_date": "2026-05-01T00:00:00+00:00",
"product_status:known_affected": "76",
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"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: accel/qaic: Handle DBC deactivation if the owner went away",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43007.json",
"version": "3"
},
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"current_release_date": "2026-08-31T17:11:46Z",
"cve": "CVE-2026-43007",
"id": "CVE-2026-43007",
"initial_release_date": "2026-05-06T01:41:31Z",
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"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",
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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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