{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-44992",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-04T20:19:34.019685Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-04T20:19:53.480Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fead60a6d5f84b472b928502a42c419253afe6c1",
              "status": "affected",
              "version": "69c3c023af25edb5433a2db824d3e7cc328f0183",
              "versionType": "git"
            },
            {
              "lessThan": "74c2ab6d653b4c2354df65a7f7f2df1925a40a51",
              "status": "affected",
              "version": "69c3c023af25edb5433a2db824d3e7cc328f0183",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.11",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10.7",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: avoid possible NULL dereference in cifs_free_subrequest()\n\nClang static checker (scan-build) warning:\n\tcifsglob.h:line 890, column 3\n\tAccess to field \u0027ops\u0027 results in a dereference of a null pointer.\n\nCommit 519be989717c (\"cifs: Add a tracepoint to track credits involved in\nR/W requests\") adds a check for \u0027rdata-\u003eserver\u0027, and let clang throw this\nwarning about NULL dereference.\n\nWhen \u0027rdata-\u003ecredits.value != 0 \u0026\u0026 rdata-\u003eserver == NULL\u0027 happens,\nadd_credits_and_wake_if() will call rdata-\u003eserver-\u003eops-\u003eadd_credits().\nThis will cause NULL dereference problem. Add a check for \u0027rdata-\u003eserver\u0027\nto avoid NULL dereference."
        }
      ],
      "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 - The precondition for the crash \u2014 `rdata-\u003eserver` being NULL while credits are still held \u2014 is produced by SMB channel teardown paths (`cifs_chan_skip_or_disable()`, channel reconnect/disable) that are driven by the remote SMB server\u0027s responses and multichannel advertisements, so a malicious, compromised, or MITM\u0027d SMB server reached over the network controls the trigger against a mounted client.\nAC:L - A hostile server controls both sides: it drives the reconnect/multichannel-disable that NULLs the channel and it controls response timing, so it can stall in-flight R/W subrequests to hold credits across the window at will. No memory-layout or victim-state condition outside the attacker\u0027s influence is needed.\nPR:N - A remote SMB server needs no account, credentials, or privileges on the victim client \u2014 the reconnect and channel-negotiation behaviour it abuses is part of normal connection maintenance on an established mount.\nUI:N - Against the common deployment of a persistent SMB mount (fstab/automount on servers, embedded and Android devices), the attacker acts on an already-mounted share with ordinary background readahead and writeback supplying the I/O; no victim action is required at attack time.\nS:U - The fault occurs in the CIFS client inside the kernel and its consequences stay within that same kernel\u0027s security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:N - The defect is a dereference of a NULL `server` pointer to reach `server-\u003eops`, which faults immediately; no out-of-bounds or freed memory is read and no data is returned to the attacker.\nI:N - Nothing is written through the bad pointer \u2014 the code path faults on the read of `-\u003eops` before any store, giving no write primitive or control-flow hijack on configurations with the standard non-zero `mmap_min_addr` and SMAP/PAN.\nA:H - The NULL dereference oopses the kernel in netfs subrequest-completion context, which is frequently a workqueue, killing writeback and rendering the mount unusable; the remote server can trigger it repeatedly."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:37:32.018Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fead60a6d5f84b472b928502a42c419253afe6c1"
        },
        {
          "url": "https://git.kernel.org/stable/c/74c2ab6d653b4c2354df65a7f7f2df1925a40a51"
        }
      ],
      "title": "smb/client: avoid possible NULL dereference in cifs_free_subrequest()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-44992",
    "datePublished": "2024-09-04T19:54:38.878Z",
    "dateReserved": "2024-08-21T05:34:56.671Z",
    "dateUpdated": "2026-08-05T11:37:32.018Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}