CVE-2024-43858 (GCVE-0-2024-43858)

Vulnerability from cvelistv5 – Published: 2024-08-17 09:24 – Updated: 2026-10-15 00:48
VLAI
Title
jfs: Fix array-index-out-of-bounds in diFree
Summary
In the Linux kernel, the following vulnerability has been resolved: jfs: Fix array-index-out-of-bounds in diFree
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 2024-09-10 16:07 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6638 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 55b732c8b09b41148eaab2fa8e31b0af47671e00 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9b3a4345957f5372041bc4f59de322f62653e862 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 538a27c8048f081a5ddd286f886eb986fbbc7f80 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 63f7fdf733add82f126ea00e2e48f6eba15ac4b9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8d8f9a477de0d7962342eedf2a599215b7c63d28 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ff14eadc278663cac69d57d3ca7fb2f394e1f8a7 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6aa6892a90a5a7fabffe5692ab9f06a7a46c6e42 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f73f969b2eb39ad8056f6c7f3a295fa2f85e313a (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.19.320 , ≤ 4.19.* (semver)
Unaffected: 5.4.282 , ≤ 5.4.* (semver)
Unaffected: 5.10.224 , ≤ 5.10.* (semver)
Unaffected: 5.15.165 , ≤ 5.15.* (semver)
Unaffected: 6.1.103 , ≤ 6.1.* (semver)
Unaffected: 6.6.44 , ≤ 6.6.* (semver)
Unaffected: 6.10.3 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < V1.1.1 (custom)
guessed Create a notification for this product.
Show details on NVD website
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                      "versionEndExcluding": "6.6.44",
                      "versionStartIncluding": "2.6.12",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.10.3",
                      "versionStartIncluding": "2.6.12",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.11",
                      "versionStartIncluding": "2.6.12",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: Fix array-index-out-of-bounds in diFree"
            }
          ],
          "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 by mounting a crafted JFS image and then unlinking a file, all through local syscalls (mount/unlink) on a block or loop device. No network protocol processing is involved.\nAC:L - The out-of-bounds index is taken verbatim from the on-disk `iagp-\u003eagstart` field, so the attacker picks the exact OOB offset deterministically in the image; there is no race and no reliance on conditions outside attacker control.\nPR:L - A low-privileged local user can supply the malicious JFS image on common desktop/kiosk configurations where udisks2/polkit permits an active session user to mount removable or loop-backed media, and the subsequent unlink that triggers `diFree` requires only ordinary write access to a directory on that filesystem.\nUI:N - Once the image is attached, no victim action is needed \u2014 the attacker\u0027s own unlink drives `jfs_evict_inode` into `diFree`, and automounters attach the media without any human step.\nS:U - The corruption stays within kernel memory under the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unchecked index produces out-of-bounds reads of `im_agctl[agno].numfree`/`numinos` and of the `im_aglock[agno]` mutex at an attacker-chosen offset, and the resulting heap corruption is a general primitive that can be leveraged for kernel memory disclosure.\nI:H - `imap-\u003eim_agctl[agno].inofree = iagno` writes an attacker-influenced 32-bit value at an attacker-chosen offset far outside the `struct inomap` allocation, and `mutex_lock()` on `im_aglock[agno]` writes a kernel pointer OOB \u2014 a controlled slab-corruption write primitive suitable for control-flow hijacking.\nA:H - Out-of-bounds writes into adjacent slab objects and locking a bogus mutex reliably produce oopses, hangs, or panics, and an OOB-read `numinos` of zero yields an immediate divide-error in the `(numfree * 100) / numinos` computation."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T11:36:50.250Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/55b732c8b09b41148eaab2fa8e31b0af47671e00"
            },
            {
              "url": "https://git.kernel.org/stable/c/9b3a4345957f5372041bc4f59de322f62653e862"
            },
            {
              "url": "https://git.kernel.org/stable/c/538a27c8048f081a5ddd286f886eb986fbbc7f80"
            },
            {
              "url": "https://git.kernel.org/stable/c/63f7fdf733add82f126ea00e2e48f6eba15ac4b9"
            },
            {
              "url": "https://git.kernel.org/stable/c/8d8f9a477de0d7962342eedf2a599215b7c63d28"
            },
            {
              "url": "https://git.kernel.org/stable/c/ff14eadc278663cac69d57d3ca7fb2f394e1f8a7"
            },
            {
              "url": "https://git.kernel.org/stable/c/6aa6892a90a5a7fabffe5692ab9f06a7a46c6e42"
            },
            {
              "url": "https://git.kernel.org/stable/c/f73f969b2eb39ad8056f6c7f3a295fa2f85e313a"
            }
          ],
          "title": "jfs: Fix array-index-out-of-bounds in diFree",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-43858",
        "datePublished": "2024-08-17T09:24:27.976Z",
        "dateReserved": "2024-08-17T09:11:59.279Z",
        "dateUpdated": "2026-10-15T00:48:28.619Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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Vulnerability timeline

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