CVE-2026-52960 (GCVE-0-2026-52960)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-08-05 12:32
VLAI
Title
ceph: put folios not suitable for writeback
Summary
In the Linux kernel, the following vulnerability has been resolved: ceph: put folios not suitable for writeback The batch holds references to the folios (see `filemap_get_folios`, `folio_batch_release`), so we need to `folio_put` the folios we remove. Tested on v6.18.
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ce80b76dd32764cc914975777e058d4fae4f0ea0 , < 86921e890fe1dea9791fb70bec552516fd47716a (git)
Affected: ce80b76dd32764cc914975777e058d4fae4f0ea0 , < 544576f0f05c4a759806acddfaaeb686f14fb4b0 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ceph/addr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "86921e890fe1dea9791fb70bec552516fd47716a",
              "status": "affected",
              "version": "ce80b76dd32764cc914975777e058d4fae4f0ea0",
              "versionType": "git"
            },
            {
              "lessThan": "544576f0f05c4a759806acddfaaeb686f14fb4b0",
              "status": "affected",
              "version": "ce80b76dd32764cc914975777e058d4fae4f0ea0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ceph/addr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: put folios not suitable for writeback\n\nThe batch holds references to the folios (see `filemap_get_folios`,\n`folio_batch_release`), so we need to `folio_put` the folios we remove.\n\nTested on v6.18."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - Direct reachability is through CephFS file writeback, and a writable CephFS tree can reasonably be exposed through kernel network fileservers such as nfsd/ksmbd, which drive the same VFS writeback path remotely.\nAC:L - The bug is a deterministic missing folio_put() on skipped writeback folios; an attacker can repeatedly create/write/delete/sync files to accumulate leaked references without needing an uncontrollable race.\nPR:N - In the network-export scenario, the attacker needs no local privileges on the vulnerable host, and writable anonymous or guest-style exports are a reasonable high-severity deployment.\nUI:N - Once the CephFS mount/export exists, exploitation only requires attacker-driven writes and writeback triggers; no victim user action is needed.\nS:U - The impact remains within the vulnerable kernel host and does not cross a separate security authority such as a guest-to-host or IOMMU boundary.\nC:N - The flaw leaks folio references and pins page-cache memory; it does not provide an information disclosure or arbitrary read primitive.\nI:N - The flaw does not corrupt memory or allow unauthorized data modification; it only prevents selected folios from being released.\nA:H - Repeated triggering can leave folios permanently unreclaimable even after unmount/drop_caches, causing severe memory pressure, swapping, allocation failures, and potential system-wide DoS."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:32:10.671Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/86921e890fe1dea9791fb70bec552516fd47716a"
        },
        {
          "url": "https://git.kernel.org/stable/c/544576f0f05c4a759806acddfaaeb686f14fb4b0"
        }
      ],
      "title": "ceph: put folios not suitable for writeback",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-52960",
    "datePublished": "2026-06-24T16:28:41.044Z",
    "dateReserved": "2026-06-09T07:44:35.373Z",
    "dateUpdated": "2026-08-05T12:32:10.671Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-52960",
      "date": "2026-09-20",
      "epss": "0.00359",
      "percentile": "0.29703"
    },
    "microsoft_vex": {
      "current_release_date": "2026-06-28T01:41:47.000Z",
      "cve": "CVE-2026-52960",
      "id": "msrc_CVE-2026-52960",
      "initial_release_date": "2026-06-02T00:00:00.000Z",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "ceph: put folios not suitable for writeback",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-52960.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "fs/ceph/addr.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "86921e890fe1dea9791fb70bec552516fd47716a",
                    "status": "affected",
                    "version": "ce80b76dd32764cc914975777e058d4fae4f0ea0",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "544576f0f05c4a759806acddfaaeb686f14fb4b0",
                    "status": "affected",
                    "version": "ce80b76dd32764cc914975777e058d4fae4f0ea0",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "fs/ceph/addr.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.15"
                  },
                  {
                    "lessThan": "6.15",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.0.*",
                    "status": "unaffected",
                    "version": "7.0.10",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.1",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "2E6E44BD-EA5E-41E8-907D-E2A9C379B66B",
                    "versionEndExcluding": "7.0.10",
                    "versionStartIncluding": "6.15",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: put folios not suitable for writeback\n\nThe batch holds references to the folios (see `filemap_get_folios`,\n`folio_batch_release`), so we need to `folio_put` the folios we remove.\n\nTested on v6.18."
          }
        ],
        "id": "CVE-2026-52960",
        "lastModified": "2026-07-14T16:20:27.163",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-06-24T17:17:06.260",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/544576f0f05c4a759806acddfaaeb686f14fb4b0"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/86921e890fe1dea9791fb70bec552516fd47716a"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-09-08T23:08:28+00:00",
      "cve": "CVE-2026-52960",
      "id": "CVE-2026-52960",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ceph: put folios not suitable for writeback",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52960.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-06T01:15:38Z",
      "cve": "CVE-2026-52960",
      "id": "CVE-2026-52960",
      "initial_release_date": "2026-06-26T02:14:40Z",
      "product_status:known_not_affected": "293",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-52960",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-52960.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

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.


Loading…