CVE-2024-54456 (GCVE-0-2024-54456)
Vulnerability from cvelistv5
Published
2025-02-27 02:18
Modified
2026-08-05 11:44
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: NFS: Fix potential buffer overflowin nfs_sysfs_link_rpc_client() name is char[64] where the size of clnt->cl_program->name remains unknown. Invoking strcat() directly will also lead to potential buffer overflow. Change them to strscpy() and strncat() to fix potential issues.
References
Impacted products
Vendor Product Version
Linux Linux Version: e13b549319a684dd80c4cc25e9567a5c84007e32
Version: e13b549319a684dd80c4cc25e9567a5c84007e32
Version: e13b549319a684dd80c4cc25e9567a5c84007e32
Version: e13b549319a684dd80c4cc25e9567a5c84007e32
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "19b3ca651b4b473878c73539febe477905041442",
              "status": "affected",
              "version": "e13b549319a684dd80c4cc25e9567a5c84007e32",
              "versionType": "git"
            },
            {
              "lessThan": "dd8830779b77f4d1206d28d02ad56a03fc0e78f7",
              "status": "affected",
              "version": "e13b549319a684dd80c4cc25e9567a5c84007e32",
              "versionType": "git"
            },
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              "lessThan": "e8e0eb5601d4a6c74c336e3710afe3a0348c469d",
              "status": "affected",
              "version": "e13b549319a684dd80c4cc25e9567a5c84007e32",
              "versionType": "git"
            },
            {
              "lessThan": "49fd4e34751e90e6df009b70cd0659dc839e7ca8",
              "status": "affected",
              "version": "e13b549319a684dd80c4cc25e9567a5c84007e32",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.79",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.79",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.16",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.4",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: Fix potential buffer overflowin nfs_sysfs_link_rpc_client()\n\nname is char[64] where the size of clnt-\u003ecl_program-\u003ename remains\nunknown. Invoking strcat() directly will also lead to potential buffer\noverflow. Change them to strscpy() and strncat() to fix potential\nissues."
        }
      ],
      "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 vulnerable code is in the NFS *client* and is reached through local filesystem operations \u2014 a `mount -t nfs` or, without any privilege, ordinary path traversal that triggers `nfs_d_automount` on an already-mounted share. Although a malicious/compromised NFS server can drive the referral submount that reaches the function, the write itself is performed from local kernel-side data, so Local is the correct vector.\nAC:L - The code path is executed deterministically on every NFS mount and every crossmnt/referral submount, with no race, no timing window, and no memory-layout precondition outside the attacker\u0027s influence.\nPR:L - `nfs_clone_server()` \u2192 `nfs_sysfs_link_rpc_client()` is invoked from the `d_automount` dentry op on plain path traversal, so any unprivileged local user with access to an NFS mount (a very common configuration \u2014 autofs/NFS home directories) reaches the function with no capability check.\nUI:N - Automount-driven submounts happen automatically as a side effect of the attacker\u0027s own directory traversal; no separate victim action is required.\nS:U - Stack corruption in the NFS client stays within the kernel\u0027s own security authority \u2014 no VM, IOMMU, or sandbox boundary is crossed.\nC:H - An out-of-bounds write past a 64-byte kernel stack buffer overwrites adjacent frame state and, once leveraged into a control-flow or pointer primitive, permits disclosure of arbitrary kernel memory. Per kernel guidance, memory corruption that can be leveraged for info disclosure is scored High.\nI:H - Unbounded `strcpy`/`strcat` into a stack array is a classic out-of-bounds write reaching saved registers and the return address, which is directly exploitable for control-flow hijack and arbitrary kernel modification; OOB writes are scored High.\nA:H - Overwriting the saved return address or stack canary causes a stack-protector panic or an oops on return, crashing the kernel."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:44:49.902Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/19b3ca651b4b473878c73539febe477905041442"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd8830779b77f4d1206d28d02ad56a03fc0e78f7"
        },
        {
          "url": "https://git.kernel.org/stable/c/e8e0eb5601d4a6c74c336e3710afe3a0348c469d"
        },
        {
          "url": "https://git.kernel.org/stable/c/49fd4e34751e90e6df009b70cd0659dc839e7ca8"
        }
      ],
      "title": "NFS: Fix potential buffer overflowin nfs_sysfs_link_rpc_client()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-54456",
    "datePublished": "2025-02-27T02:18:08.143Z",
    "dateReserved": "2025-02-27T02:16:34.098Z",
    "dateUpdated": "2026-08-05T11:44:49.902Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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