CVE-2026-31621 (GCVE-0-2026-31621)
Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-06-14 17:43
VLAI
EPSS
VEX
Title
bnge: return after auxiliary_device_uninit() in error path
Summary
In the Linux kernel, the following vulnerability has been resolved:
bnge: return after auxiliary_device_uninit() in error path
When auxiliary_device_add() fails, the error block calls
auxiliary_device_uninit() but does not return. The uninit drops the
last reference and synchronously runs bnge_aux_dev_release(), which sets
bd->auxr_dev = NULL and frees the underlying object. The subsequent
bd->auxr_dev->net = bd->netdev then dereferences NULL, which is not a
good thing to have happen when trying to clean up from an error.
Add the missing return, as the auxiliary bus documentation states is a
requirement (seems that LLM tools read documentation better than humans
do...)
Severity
5.5 (Medium)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8ac050ec3b1c0dcb5e89cf86fe2ebe0afcc73554 , < 38c383ec6d37f4b5597f8e6a1f5c2ab31ea01d3a
(git)
Affected: 8ac050ec3b1c0dcb5e89cf86fe2ebe0afcc73554 , < 87bc3557c708110d83086bf091328271298a44e3 (git) Affected: 8ac050ec3b1c0dcb5e89cf86fe2ebe0afcc73554 , < 8b0c25528cb64f71a73b5c0d49cbbcb68540a4ce (git) |
guessed | |
| Linux | Linux |
Affected:
6.19
Unaffected: 0 , < 6.19 (semver) Unaffected: 6.19.14 , ≤ 6.19.* (semver) Unaffected: 7.0.1 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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}
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"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbnge: retornar despu\u00e9s de auxiliary_device_uninit() en la ruta de error\n\nCuando auxiliary_device_add() falla, el bloque de error llama a auxiliary_device_uninit() pero no retorna. La desinicializaci\u00f3n libera la \u00faltima referencia y ejecuta sincr\u00f3nicamente bnge_aux_dev_release(), lo que establece bd -\u003e auxr_dev = NULL y libera el objeto subyacente. La subsiguiente operaci\u00f3n bd -\u003e auxr_dev -\u003e net = bd -\u003e netdev entonces desreferencia NULL, lo cual no es algo bueno que ocurra al intentar limpiar un error.\n\nA\u00f1adir el retorno faltante, ya que la documentaci\u00f3n del bus auxiliar establece que es un requisito (parece que las herramientas LLM leen la documentaci\u00f3n mejor que los humanos...)."
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"id": "CVE-2026-31621",
"lastModified": "2026-11-11T23:10:00.263",
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"scope": "UNCHANGED",
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Confirmed: The vulnerability has been validated from an analyst's perspective.
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Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
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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
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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.
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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.