Vulnerability-Lookup

FKIE_CVE-2024-27034

Vulnerability from fkie_nvd - Published: 2024-05-01 13:15 - Updated: 2026-08-04 11:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: f2fs: compress: fix to cover normal cluster write with cp_rwsem When we overwrite compressed cluster w/ normal cluster, we should not unlock cp_rwsem during f2fs_write_raw_pages(), otherwise data will be corrupted if partial blocks were persisted before CP & SPOR, due to cluster metadata wasn't updated atomically.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2b1b14d9fc94b8feae20808684c8af28ec80f45b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/52982edfcefd475cc34af663d5c47c0cddaa5739	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/542c8b3c774a480bfd0804291a12f6f2391b0cd1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/75abfd61392b1db391bde6d738a30d685b843286	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7d420eaaa18ec8e2bb4eeab8c65c00492ef6f416	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fd244524c2cf07b5f4c3fe8abd6a99225c76544b	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/2b1b14d9fc94b8feae20808684c8af28ec80f45b	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/52982edfcefd475cc34af663d5c47c0cddaa5739	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/542c8b3c774a480bfd0804291a12f6f2391b0cd1	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/75abfd61392b1db391bde6d738a30d685b843286	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/7d420eaaa18ec8e2bb4eeab8c65c00492ef6f416	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/fd244524c2cf07b5f4c3fe8abd6a99225c76544b	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

{
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              "version": "6.7.11",
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  ],
  "cveTags": [],
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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: compress: fix to cover normal cluster write with cp_rwsem\n\nWhen we overwrite compressed cluster w/ normal cluster, we should\nnot unlock cp_rwsem during f2fs_write_raw_pages(), otherwise data\nwill be corrupted if partial blocks were persisted before CP \u0026 SPOR,\ndue to cluster metadata wasn\u0027t updated atomically."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: f2fs: compress: correcci\u00f3n para cubrir la escritura normal del cl\u00faster con cp_rwsem Cuando sobrescribimos el cl\u00faster comprimido con el cl\u00faster normal, no debemos desbloquear cp_rwsem durante f2fs_write_raw_pages(); de lo contrario, los datos se da\u00f1ar\u00e1n si Los bloques parciales persistieron antes de CP y SPOR, debido a que los metadatos del cl\u00faster no se actualizaron at\u00f3micamente."
    }
  ],
  "id": "CVE-2024-27034",
  "lastModified": "2026-08-04T11:17:36.413",
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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        "type": "Secondary"
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          "confidentialityImpact": "NONE",
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          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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  "vulnStatus": "Modified",
  "weaknesses": [
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}

CVE-2024-27034 (GCVE-0-2024-27034)

Vulnerability from cvelistv5 – Published: 2024-05-01 12:53 – Updated: 2026-08-05 11:29

Title

f2fs: compress: fix to cover normal cluster write with cp_rwsem

Summary

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-05-09 18:39 UTC

Assigner

Linux mitre root Scorecard

References

6 references

URL	Tags
https://git.kernel.org/stable/c/7d420eaaa18ec8e2b…
https://git.kernel.org/stable/c/542c8b3c774a480bf…
https://git.kernel.org/stable/c/75abfd61392b1db39…
https://git.kernel.org/stable/c/2b1b14d9fc94b8fea…
https://git.kernel.org/stable/c/52982edfcefd475cc…
https://git.kernel.org/stable/c/fd244524c2cf07b5f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4c8ff7095bef64fc47e996a938f7d57f9e077da3 , < 7d420eaaa18ec8e2bb4eeab8c65c00492ef6f416 (git) Affected: 4c8ff7095bef64fc47e996a938f7d57f9e077da3 , < 542c8b3c774a480bfd0804291a12f6f2391b0cd1 (git) Affected: 4c8ff7095bef64fc47e996a938f7d57f9e077da3 , < 75abfd61392b1db391bde6d738a30d685b843286 (git) Affected: 4c8ff7095bef64fc47e996a938f7d57f9e077da3 , < 2b1b14d9fc94b8feae20808684c8af28ec80f45b (git) Affected: 4c8ff7095bef64fc47e996a938f7d57f9e077da3 , < 52982edfcefd475cc34af663d5c47c0cddaa5739 (git) Affected: 4c8ff7095bef64fc47e996a938f7d57f9e077da3 , < fd244524c2cf07b5f4c3fe8abd6a99225c76544b (git)
Linux	Linux	Affected: 5.6 Unaffected: 0 , < 5.6 (semver) Unaffected: 5.15.153 , ≤ 5.15.* (semver) Unaffected: 6.1.83 , ≤ 6.1.* (semver) Unaffected: 6.6.23 , ≤ 6.6.* (semver) Unaffected: 6.7.11 , ≤ 6.7.* (semver) Unaffected: 6.8.2 , ≤ 6.8.* (semver) Unaffected: 6.9 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-27034",
                "options": [
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-09T18:39:02.187775Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
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        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:21:05.902Z",
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            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.153",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.83",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.23",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.11",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.2",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: compress: fix to cover normal cluster write with cp_rwsem\n\nWhen we overwrite compressed cluster w/ normal cluster, we should\nnot unlock cp_rwsem during f2fs_write_raw_pages(), otherwise data\nwill be corrupted if partial blocks were persisted before CP \u0026 SPOR,\ndue to cluster metadata wasn\u0027t updated atomically."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is reached through ordinary local file I/O on an f2fs filesystem \u2014 write(2)/mmap dirty pages on a compression-enabled file plus writeback, with syncfs(2) driving the concurrent checkpoint. No network protocol handler is involved.\nAC:L - The attacker controls both sides of the race: one thread overwrites a compressed cluster with incompressible data to enter f2fs_write_raw_pages(), while another thread repeatedly calls the unprivileged syncfs(2), which takes cp_rwsem for write in the window the writer drops it between pages. No condition outside attacker influence is needed to create the inconsistent on-disk cluster state.\nPR:L - Only an unprivileged local account with write access to a file on the f2fs mount is required; f2fs_setflags_common() permits any file owner to set F2FS_COMPR_FL via FS_IOC_SETFLAGS, and compress_extension= mount options enable it automatically. No capability check exists on the write, writeback, or syncfs paths.\nUI:N - The attacker performs every step itself \u2014 creating the compressed file, overwriting the cluster, and forcing checkpoints. On Android and embedded devices the f2fs volume is already mounted at boot, so no victim action is needed.\nS:U - The corruption is confined to the f2fs filesystem and kernel managing it; no security authority boundary such as a VM, hypervisor, or IOMMU domain is crossed.\nC:H - Non-atomic cluster conversion corrupts dnode block addresses together with i_compr_blocks and total_valid_block_count, so blocks can become cross-linked \u2014 an attacker-controlled file ends up referencing blocks the allocator has reassigned to another user\u0027s file, exposing their contents on read. Half-converted clusters also cause stale compressed blocks to be decompressed into the attacker\u0027s page cache.\nI:H - This is fundamentally an integrity bug: the commit states data will be corrupted because cluster metadata is not updated atomically, and the resulting inconsistent dnode blkaddrs, i_blocks, and total_valid_block_count are persistent on-disk filesystem corruption that requires fsck. Cross-linked blocks additionally let the attacker overwrite data belonging to other files.\nA:H - The corrupted cluster makes f2fs_sanity_check_cluster()/__f2fs_cluster_blocks() return -EFSCORRUPTED and set SBI_NEED_FSCK, and f2fs_handle_error() can force the filesystem read-only or panic the kernel under errors=panic. On an embedded, automotive, or Android device whose rootfs/userdata is f2fs, the corrupted volume renders the system unbootable until repaired."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:29:08.856Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7d420eaaa18ec8e2bb4eeab8c65c00492ef6f416"
        },
        {
          "url": "https://git.kernel.org/stable/c/542c8b3c774a480bfd0804291a12f6f2391b0cd1"
        },
        {
          "url": "https://git.kernel.org/stable/c/75abfd61392b1db391bde6d738a30d685b843286"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b1b14d9fc94b8feae20808684c8af28ec80f45b"
        },
        {
          "url": "https://git.kernel.org/stable/c/52982edfcefd475cc34af663d5c47c0cddaa5739"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd244524c2cf07b5f4c3fe8abd6a99225c76544b"
        }
      ],
      "title": "f2fs: compress: fix to cover normal cluster write with cp_rwsem",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-27034",
    "datePublished": "2024-05-01T12:53:39.767Z",
    "dateReserved": "2024-02-19T14:20:24.211Z",
    "dateUpdated": "2026-08-05T11:29:08.856Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

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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FKIE_CVE-2024-27034

CVE-2024-27034 (GCVE-0-2024-27034)

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Sightings

Nomenclature

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