Vulnerability-Lookup

GHSA-MVR8-9V2M-PG6F

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

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

PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails

When vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap() doesn't invoke percpu_ref_put() to free the per-CPU ref of pgmap acquired after gen_pool_alloc_owner(), and memunmap_pages() will hang forever when trying to remove the PCI device.

Fix it by adding the missed percpu_ref_put().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-45880"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:01Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails\n\nWhen vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap()\ndoesn\u0027t invoke percpu_ref_put() to free the per-CPU ref of pgmap acquired\nafter gen_pool_alloc_owner(), and memunmap_pages() will hang forever when\ntrying to remove the PCI device.\n\nFix it by adding the missed percpu_ref_put().",
  "id": "GHSA-mvr8-9v2m-pg6f",
  "modified": "2026-05-27T15:33:14Z",
  "published": "2026-05-27T15:33:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45880"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51b7181cfbedf289ce794b6d97a1c596c309ec38"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6220694c52a5a04102b48109e4f24e958b559bd3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1f4dc72efc3204db95d052058d785cad7ce755f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/baa42b756d183a59572f3890981a3d32b8d05d40"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e19cce88ec4c4877f4ff2469099b9cf23cc3e93e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-45880 (GCVE-0-2026-45880)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:16 – Updated: 2026-05-27 12:16

Title

PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails

Summary

In the Linux kernel, the following vulnerability has been resolved: PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails When vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap() doesn't invoke percpu_ref_put() to free the per-CPU ref of pgmap acquired after gen_pool_alloc_owner(), and memunmap_pages() will hang forever when trying to remove the PCI device. Fix it by adding the missed percpu_ref_put().

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/baa42b756d183a595…
https://git.kernel.org/stable/c/51b7181cfbedf289c…
https://git.kernel.org/stable/c/e19cce88ec4c4877f…
https://git.kernel.org/stable/c/a1f4dc72efc3204db…
https://git.kernel.org/stable/c/6220694c52a5a0410…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 , < baa42b756d183a59572f3890981a3d32b8d05d40 (git) Affected: 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 , < 51b7181cfbedf289ce794b6d97a1c596c309ec38 (git) Affected: 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 , < e19cce88ec4c4877f4ff2469099b9cf23cc3e93e (git) Affected: 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 , < a1f4dc72efc3204db95d052058d785cad7ce755f (git) Affected: 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 , < 6220694c52a5a04102b48109e4f24e958b559bd3 (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.14 , ≤ 6.18.* (semver) Unaffected: 6.19.4 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/p2pdma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "baa42b756d183a59572f3890981a3d32b8d05d40",
              "status": "affected",
              "version": "7e9c7ef83d785236f5a8c3761dd053fae9b92fb8",
              "versionType": "git"
            },
            {
              "lessThan": "51b7181cfbedf289ce794b6d97a1c596c309ec38",
              "status": "affected",
              "version": "7e9c7ef83d785236f5a8c3761dd053fae9b92fb8",
              "versionType": "git"
            },
            {
              "lessThan": "e19cce88ec4c4877f4ff2469099b9cf23cc3e93e",
              "status": "affected",
              "version": "7e9c7ef83d785236f5a8c3761dd053fae9b92fb8",
              "versionType": "git"
            },
            {
              "lessThan": "a1f4dc72efc3204db95d052058d785cad7ce755f",
              "status": "affected",
              "version": "7e9c7ef83d785236f5a8c3761dd053fae9b92fb8",
              "versionType": "git"
            },
            {
              "lessThan": "6220694c52a5a04102b48109e4f24e958b559bd3",
              "status": "affected",
              "version": "7e9c7ef83d785236f5a8c3761dd053fae9b92fb8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/p2pdma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.128",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.14",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails\n\nWhen vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap()\ndoesn\u0027t invoke percpu_ref_put() to free the per-CPU ref of pgmap acquired\nafter gen_pool_alloc_owner(), and memunmap_pages() will hang forever when\ntrying to remove the PCI device.\n\nFix it by adding the missed percpu_ref_put()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:16:52.117Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/baa42b756d183a59572f3890981a3d32b8d05d40"
        },
        {
          "url": "https://git.kernel.org/stable/c/51b7181cfbedf289ce794b6d97a1c596c309ec38"
        },
        {
          "url": "https://git.kernel.org/stable/c/e19cce88ec4c4877f4ff2469099b9cf23cc3e93e"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1f4dc72efc3204db95d052058d785cad7ce755f"
        },
        {
          "url": "https://git.kernel.org/stable/c/6220694c52a5a04102b48109e4f24e958b559bd3"
        }
      ],
      "title": "PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45880",
    "datePublished": "2026-05-27T12:16:52.117Z",
    "dateReserved": "2026-05-13T15:03:33.082Z",
    "dateUpdated": "2026-05-27T12:16:52.117Z",
    "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.

Action not permitted

GHSA-MVR8-9V2M-PG6F

CVE-2026-45880 (GCVE-0-2026-45880)

Tags

Sightings

Nomenclature