CVE-2024-39472 (GCVE-0-2024-39472)
Vulnerability from cvelistv5
Published
2024-07-05 06:42
Modified
2026-08-05 11:33
Severity ?
7.3 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: xfs: fix log recovery buffer allocation for the legacy h_size fixup Commit a70f9fe52daa ("xfs: detect and handle invalid iclog size set by mkfs") added a fixup for incorrect h_size values used for the initial umount record in old xfsprogs versions. Later commit 0c771b99d6c9 ("xfs: clean up calculation of LR header blocks") cleaned up the log reover buffer calculation, but stoped using the fixed up h_size value to size the log recovery buffer, which can lead to an out of bounds access when the incorrect h_size does not come from the old mkfs tool, but a fuzzer. Fix this by open coding xlog_logrec_hblks and taking the fixed h_size into account for this calculation.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0c771b99d6c9a0552fea5cc43669b726dad8f659
Version: 0c771b99d6c9a0552fea5cc43669b726dad8f659
Version: 0c771b99d6c9a0552fea5cc43669b726dad8f659
Version: 0c771b99d6c9a0552fea5cc43669b726dad8f659
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T21:56:05.270Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/45cf976008ddef4a9c9a30310c9b4fb2a9a6602a"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-39472",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:07:45.783551Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:34:41.426Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/xfs_log_recover.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f754591b17d0ee91c2b45fe9509d0cdc420527cb",
              "status": "affected",
              "version": "0c771b99d6c9a0552fea5cc43669b726dad8f659",
              "versionType": "git"
            },
            {
              "lessThan": "57835c0e7152e36b03875dd6c56dfeed685c1b1f",
              "status": "affected",
              "version": "0c771b99d6c9a0552fea5cc43669b726dad8f659",
              "versionType": "git"
            },
            {
              "lessThan": "c2389c074973aa94e34992e7f66dac0de37595b5",
              "status": "affected",
              "version": "0c771b99d6c9a0552fea5cc43669b726dad8f659",
              "versionType": "git"
            },
            {
              "lessThan": "45cf976008ddef4a9c9a30310c9b4fb2a9a6602a",
              "status": "affected",
              "version": "0c771b99d6c9a0552fea5cc43669b726dad8f659",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/xfs_log_recover.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.165",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.105",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.46",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix log recovery buffer allocation for the legacy h_size fixup\n\nCommit a70f9fe52daa (\"xfs: detect and handle invalid iclog size set by\nmkfs\") added a fixup for incorrect h_size values used for the initial\numount record in old xfsprogs versions.  Later commit 0c771b99d6c9\n(\"xfs: clean up calculation of LR header blocks\") cleaned up the log\nreover buffer calculation, but stoped using the fixed up h_size value\nto size the log recovery buffer, which can lead to an out of bounds\naccess when the incorrect h_size does not come from the old mkfs\ntool, but a fuzzer.\n\nFix this by open coding xlog_logrec_hblks and taking the fixed h_size\ninto account for this calculation."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only through XFS log recovery at mount time on a locally attached block device or image file; no network or remote-peer data reaches this code. Delivery via removable media still requires the image to be mounted on the local system.\nAC:L - Every input is attacker-chosen on-disk data \u2014 `sb_logsunit` (raises `m_logbsize` to 256K with no mount option needed), and `h_size`/`h_len`/`h_num_logops`/`h_version` in the tail log record \u2014 so the undersized `hbp` and the ~224 KB overread happen deterministically on every mount, with no race and no memory layout to groom.\nPR:N - The attacker needs no account or privilege on the target; they only need to hand over a crafted XFS image (USB stick, disk image, exported LUN) that is then mounted by the victim or by an automounter such as udisks2 on a desktop or kiosk. Equivalently, an unprivileged local user on an automount-enabled system reaches it with PR:L/UI:N, which yields the identical exploitability score.\nUI:R - A user or automount service must mount the malicious filesystem with a dirty log so that `xlog_do_recovery_pass()` runs; the attacker cannot initiate the mount themselves.\nS:U - The out-of-bounds access and its consequences stay inside the kernel\u0027s own security authority \u2014 no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - `xlog_cksum()` and `xlog_unpack_data()` read at 32 KB strides up to ~224 KB past a 512-byte `kvzalloc()` slab object, and on a non-CRC (v4) image the harvested heap dwords are copied into the replayed log data and committed to the filesystem, giving the attacker a large, readable kernel heap disclosure.\nI:L - There is no out-of-bounds write \u2014 `dbp` is sized from the fixed-up `h_size` and `bblks \u003c= BTOBB(h_size)` \u2014 but the out-of-bounds kernel heap dwords are spliced into the log record data by `xlog_unpack_data()` and replayed into on-disk metadata, producing limited, attacker-uncontrolled modification of filesystem data.\nA:H - Reading roughly 224 KB beyond a 512-byte slab allocation readily crosses into unmapped memory, producing a page fault/oops (or a KASAN slab-out-of-bounds panic) during mount, taking down the system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:33:29.670Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f754591b17d0ee91c2b45fe9509d0cdc420527cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/57835c0e7152e36b03875dd6c56dfeed685c1b1f"
        },
        {
          "url": "https://git.kernel.org/stable/c/c2389c074973aa94e34992e7f66dac0de37595b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/45cf976008ddef4a9c9a30310c9b4fb2a9a6602a"
        }
      ],
      "title": "xfs: fix log recovery buffer allocation for the legacy h_size fixup",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-39472",
    "datePublished": "2024-07-05T06:42:03.495Z",
    "dateReserved": "2024-06-25T14:23:23.745Z",
    "dateUpdated": "2026-08-05T11:33:29.670Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/45cf976008ddef4a9c9a30310c9b4fb2a9a6602a\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:26:15.909Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-39472\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T17:07:45.783551Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:25.222Z\"}}], \"cna\": {\"title\": \"xfs: fix log recovery buffer allocation for the legacy h_size fixup\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"0c771b99d6c9a0552fea5cc43669b726dad8f659\", \"lessThan\": \"f754591b17d0ee91c2b45fe9509d0cdc420527cb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c771b99d6c9a0552fea5cc43669b726dad8f659\", \"lessThan\": \"57835c0e7152e36b03875dd6c56dfeed685c1b1f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c771b99d6c9a0552fea5cc43669b726dad8f659\", \"lessThan\": \"c2389c074973aa94e34992e7f66dac0de37595b5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c771b99d6c9a0552fea5cc43669b726dad8f659\", \"lessThan\": \"45cf976008ddef4a9c9a30310c9b4fb2a9a6602a\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/xfs/xfs_log_recover.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.165\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.105\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.46\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/xfs/xfs_log_recover.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f754591b17d0ee91c2b45fe9509d0cdc420527cb\"}, {\"url\": \"https://git.kernel.org/stable/c/57835c0e7152e36b03875dd6c56dfeed685c1b1f\"}, {\"url\": \"https://git.kernel.org/stable/c/c2389c074973aa94e34992e7f66dac0de37595b5\"}, {\"url\": \"https://git.kernel.org/stable/c/45cf976008ddef4a9c9a30310c9b4fb2a9a6602a\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nxfs: fix log recovery buffer allocation for the legacy h_size fixup\\n\\nCommit a70f9fe52daa (\\\"xfs: detect and handle invalid iclog size set by\\nmkfs\\\") added a fixup for incorrect h_size values used for the initial\\numount record in old xfsprogs versions.  Later commit 0c771b99d6c9\\n(\\\"xfs: clean up calculation of LR header blocks\\\") cleaned up the log\\nreover buffer calculation, but stoped using the fixed up h_size value\\nto size the log recovery buffer, which can lead to an out of bounds\\naccess when the incorrect h_size does not come from the old mkfs\\ntool, but a fuzzer.\\n\\nFix this by open coding xlog_logrec_hblks and taking the fixed h_size\\ninto account for this calculation.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T09:06:49.651Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-39472\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T09:06:49.651Z\", \"dateReserved\": \"2024-06-25T14:23:23.745Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-05T06:42:03.495Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.