Vulnerability-Lookup

GHSA-Q4FH-XH4R-X3XP

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-29 09:30

Details

In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

The airq_iv_create() can return NULL on failure, but the return value was never checked. If it fails, zdev->aibv will be NULL and fail when dereferenced in kvm_zpci_set_airq(). Add a NULL check and free the previously allocated AISB bit and zdev->aisb on failure.

Severity

9.3 (Critical)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80684"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:53Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: pci: Fix NULL dereference on AIBV allocation failure\n\nThe airq_iv_create() can return NULL on failure, but the return value was\nnever checked. If it fails, zdev-\u003eaibv will be NULL and fail when\ndereferenced in kvm_zpci_set_airq(). Add a NULL check and free the\npreviously allocated AISB bit and zdev-\u003eaisb on failure.",
  "id": "GHSA-q4fh-xh4r-x3xp",
  "modified": "2026-08-29T09:30:28Z",
  "published": "2026-08-28T09:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80684"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a95abe964400771ad82b027d7b84a0d183cd0db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8bf09b9b7d3232806df95f409581f8a9fd99a3fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96099486b63985801c9c6ef22505e9aa635b2d20"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1a103dc9016c25e7423ce5841a5cc2df76d59f3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df947d85e164a50a29d43a96e814f69ab1d0f7ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e137d082325bbcae780087b57501d38585e625d9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-80684 (GCVE-0-2026-80684)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:52 – Updated: 2026-10-16 19:26

Title

KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix NULL dereference on AIBV allocation failure The airq_iv_create() can return NULL on failure, but the return value was never checked. If it fails, zdev->aibv will be NULL and fail when dereferenced in kvm_zpci_set_airq(). Add a NULL check and free the previously allocated AISB bit and zdev->aisb on failure.

Severity

9.3 (Critical)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-16 19:19 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6664 records in the last 180 days details

References

6 references

URL	Tags
https://git.kernel.org/stable/c/96099486b63985801…
https://git.kernel.org/stable/c/0a95abe964400771a…
https://git.kernel.org/stable/c/df947d85e164a50a2…
https://git.kernel.org/stable/c/e137d082325bbcae7…
https://git.kernel.org/stable/c/d1a103dc9016c25e7…
https://git.kernel.org/stable/c/8bf09b9b7d3232806…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc , < 96099486b63985801c9c6ef22505e9aa635b2d20 (git) Affected: 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc , < 0a95abe964400771ad82b027d7b84a0d183cd0db (git) Affected: 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc , < df947d85e164a50a29d43a96e814f69ab1d0f7ed (git) Affected: 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc , < e137d082325bbcae780087b57501d38585e625d9 (git) Affected: 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc , < d1a103dc9016c25e7423ce5841a5cc2df76d59f3 (git) Affected: 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc , < 8bf09b9b7d3232806df95f409581f8a9fd99a3fa (git)
Linux	Linux	Affected: 6.0 Unaffected: 0 , < 6.0 (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.151 , ≤ 6.6.* (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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          {
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                "id": "CVE-2026-80684",
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                  {
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                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T19:19:58.006717Z",
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      ],
      "cpeApplicability": [
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        }
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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.

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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.
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