Vulnerability-Lookup

FKIE_CVE-2026-80940

Vulnerability from fkie_nvd - Published: 2026-09-11 20:18 - Updated: 2026-09-11 20:18

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: pci: fix resource leak on failed NAPI setup rtw_pci_probe() allocates PCI resources through rtw_pci_setup_resource() before it sets up NAPI. If rtw_pci_napi_init() fails, the error path jumps straight to err_pci_declaim and skips rtw_pci_destroy(), leaving the PCI resources allocated by rtw_pci_setup_resource() behind. Add a dedicated cleanup label for the NAPI setup failure path so probe destroys the PCI resources. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing current mainline kernels. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc7. An x86_64 allyesconfig build showed no new warnings. As we do not have a suitable rtw88 PCI board to test with, no runtime testing was able to be performed.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/34a505071d1ffc5ebf3dc3cd16d2a12b044bcc84
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/481fff9bda01720c70b19fb260808145a3f21594
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b1596e212ab1739930b25b9d3daf6b5cd307b537
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e779df4806cd29cbcca5c9dc0a1073662c76b889

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw88/pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "481fff9bda01720c70b19fb260808145a3f21594",
              "status": "affected",
              "version": "d0bcb10e7b94861c714ab1e62c98bf8abaa37527",
              "versionType": "git"
            },
            {
              "lessThan": "34a505071d1ffc5ebf3dc3cd16d2a12b044bcc84",
              "status": "affected",
              "version": "d0bcb10e7b94861c714ab1e62c98bf8abaa37527",
              "versionType": "git"
            },
            {
              "lessThan": "b1596e212ab1739930b25b9d3daf6b5cd307b537",
              "status": "affected",
              "version": "d0bcb10e7b94861c714ab1e62c98bf8abaa37527",
              "versionType": "git"
            },
            {
              "lessThan": "e779df4806cd29cbcca5c9dc0a1073662c76b889",
              "status": "affected",
              "version": "d0bcb10e7b94861c714ab1e62c98bf8abaa37527",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw88/pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw88: pci: fix resource leak on failed NAPI setup\n\nrtw_pci_probe() allocates PCI resources through\nrtw_pci_setup_resource() before it sets up NAPI. If\nrtw_pci_napi_init() fails, the error path jumps straight to\nerr_pci_declaim and skips rtw_pci_destroy(), leaving the PCI\nresources allocated by rtw_pci_setup_resource() behind.\n\nAdd a dedicated cleanup label for the NAPI setup failure path so probe\ndestroys the PCI resources.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing current\nmainline kernels. The tool is still under development and is not yet\npublicly available. Manual inspection confirms that the bug is still\npresent in v7.1-rc7.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have a\nsuitable rtw88 PCI board to test with, no runtime testing was able to be\nperformed."
    }
  ],
  "id": "CVE-2026-80940",
  "lastModified": "2026-09-11T20:18:58.757",
  "metrics": {},
  "published": "2026-09-11T20:18:58.757",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/34a505071d1ffc5ebf3dc3cd16d2a12b044bcc84"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/481fff9bda01720c70b19fb260808145a3f21594"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b1596e212ab1739930b25b9d3daf6b5cd307b537"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e779df4806cd29cbcca5c9dc0a1073662c76b889"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-80940 (GCVE-0-2026-80940)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:42 – Updated: 2026-09-11 19:42

Title

wifi: rtw88: pci: fix resource leak on failed NAPI setup

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/481fff9bda01720c7…
https://git.kernel.org/stable/c/34a505071d1ffc5eb…
https://git.kernel.org/stable/c/b1596e212ab173993…
https://git.kernel.org/stable/c/e779df4806cd29cbc…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d0bcb10e7b94861c714ab1e62c98bf8abaa37527 , < 481fff9bda01720c70b19fb260808145a3f21594 (git) Affected: d0bcb10e7b94861c714ab1e62c98bf8abaa37527 , < 34a505071d1ffc5ebf3dc3cd16d2a12b044bcc84 (git) Affected: d0bcb10e7b94861c714ab1e62c98bf8abaa37527 , < b1596e212ab1739930b25b9d3daf6b5cd307b537 (git) Affected: d0bcb10e7b94861c714ab1e62c98bf8abaa37527 , < e779df4806cd29cbcca5c9dc0a1073662c76b889 (git)
Linux	Linux	Affected: 6.11 Unaffected: 0 , < 6.11 (semver) Unaffected: 6.12.109 , ≤ 6.12.* (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw88/pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "481fff9bda01720c70b19fb260808145a3f21594",
              "status": "affected",
              "version": "d0bcb10e7b94861c714ab1e62c98bf8abaa37527",
              "versionType": "git"
            },
            {
              "lessThan": "34a505071d1ffc5ebf3dc3cd16d2a12b044bcc84",
              "status": "affected",
              "version": "d0bcb10e7b94861c714ab1e62c98bf8abaa37527",
              "versionType": "git"
            },
            {
              "lessThan": "b1596e212ab1739930b25b9d3daf6b5cd307b537",
              "status": "affected",
              "version": "d0bcb10e7b94861c714ab1e62c98bf8abaa37527",
              "versionType": "git"
            },
            {
              "lessThan": "e779df4806cd29cbcca5c9dc0a1073662c76b889",
              "status": "affected",
              "version": "d0bcb10e7b94861c714ab1e62c98bf8abaa37527",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw88/pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw88: pci: fix resource leak on failed NAPI setup\n\nrtw_pci_probe() allocates PCI resources through\nrtw_pci_setup_resource() before it sets up NAPI. If\nrtw_pci_napi_init() fails, the error path jumps straight to\nerr_pci_declaim and skips rtw_pci_destroy(), leaving the PCI\nresources allocated by rtw_pci_setup_resource() behind.\n\nAdd a dedicated cleanup label for the NAPI setup failure path so probe\ndestroys the PCI resources.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing current\nmainline kernels. The tool is still under development and is not yet\npublicly available. Manual inspection confirms that the bug is still\npresent in v7.1-rc7.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have a\nsuitable rtw88 PCI board to test with, no runtime testing was able to be\nperformed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-11T19:42:13.084Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/481fff9bda01720c70b19fb260808145a3f21594"
        },
        {
          "url": "https://git.kernel.org/stable/c/34a505071d1ffc5ebf3dc3cd16d2a12b044bcc84"
        },
        {
          "url": "https://git.kernel.org/stable/c/b1596e212ab1739930b25b9d3daf6b5cd307b537"
        },
        {
          "url": "https://git.kernel.org/stable/c/e779df4806cd29cbcca5c9dc0a1073662c76b889"
        }
      ],
      "title": "wifi: rtw88: pci: fix resource leak on failed NAPI setup",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80940",
    "datePublished": "2026-09-11T19:42:13.084Z",
    "dateReserved": "2026-08-26T14:34:25.803Z",
    "dateUpdated": "2026-09-11T19:42:13.084Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.

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