FKIE_CVE-2022-49878

Vulnerability from fkie_nvd - Published: 2025-05-01 15:16 - Updated: 2026-06-17 05:19
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: bpf, verifier: Fix memory leak in array reallocation for stack state If an error (NULL) is returned by krealloc(), callers of realloc_array() were setting their allocation pointers to NULL, but on error krealloc() does not touch the original allocation. This would result in a memory resource leak. Instead, free the old allocation on the error handling path. The memory leak information is as follows as also reported by Zhengchao: unreferenced object 0xffff888019801800 (size 256): comm "bpf_repo", pid 6490, jiffies 4294959200 (age 17.170s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000b211474b>] __kmalloc_node_track_caller+0x45/0xc0 [<0000000086712a0b>] krealloc+0x83/0xd0 [<00000000139aab02>] realloc_array+0x82/0xe2 [<00000000b1ca41d1>] grow_stack_state+0xfb/0x186 [<00000000cd6f36d2>] check_mem_access.cold+0x141/0x1341 [<0000000081780455>] do_check_common+0x5358/0xb350 [<0000000015f6b091>] bpf_check.cold+0xc3/0x29d [<000000002973c690>] bpf_prog_load+0x13db/0x2240 [<00000000028d1644>] __sys_bpf+0x1605/0x4ce0 [<00000000053f29bd>] __x64_sys_bpf+0x75/0xb0 [<0000000056fedaf5>] do_syscall_64+0x35/0x80 [<000000002bd58261>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/06615967d4889b08b19ff3dda96e8b131282f73dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e210891c4a4c2d858cd6f9f61d5809af251d4dfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/42378a9ca55347102bbf86708776061d8fe3ece2Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "06615967d4889b08b19ff3dda96e8b131282f73d",
              "status": "affected",
              "version": "c69431aab67a912836e5831f03d99a819c14c9c3",
              "versionType": "git"
            },
            {
              "lessThan": "3e210891c4a4c2d858cd6f9f61d5809af251d4df",
              "status": "affected",
              "version": "c69431aab67a912836e5831f03d99a819c14c9c3",
              "versionType": "git"
            },
            {
              "lessThan": "42378a9ca55347102bbf86708776061d8fe3ece2",
              "status": "affected",
              "version": "c69431aab67a912836e5831f03d99a819c14c9c3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.79",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FB443DA9-A9E7-45CA-AAF4-AF14F567FE9F",
              "versionEndExcluding": "5.15.79",
              "versionStartIncluding": "5.14",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C3F26709-7D49-4AF0-8145-46CCF4E8E2AD",
              "versionEndExcluding": "6.0.9",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, verifier: Fix memory leak in array reallocation for stack state\n\nIf an error (NULL) is returned by krealloc(), callers of realloc_array()\nwere setting their allocation pointers to NULL, but on error krealloc()\ndoes not touch the original allocation. This would result in a memory\nresource leak. Instead, free the old allocation on the error handling\npath.\n\nThe memory leak information is as follows as also reported by Zhengchao:\n\n  unreferenced object 0xffff888019801800 (size 256):\n  comm \"bpf_repo\", pid 6490, jiffies 4294959200 (age 17.170s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [\u003c00000000b211474b\u003e] __kmalloc_node_track_caller+0x45/0xc0\n    [\u003c0000000086712a0b\u003e] krealloc+0x83/0xd0\n    [\u003c00000000139aab02\u003e] realloc_array+0x82/0xe2\n    [\u003c00000000b1ca41d1\u003e] grow_stack_state+0xfb/0x186\n    [\u003c00000000cd6f36d2\u003e] check_mem_access.cold+0x141/0x1341\n    [\u003c0000000081780455\u003e] do_check_common+0x5358/0xb350\n    [\u003c0000000015f6b091\u003e] bpf_check.cold+0xc3/0x29d\n    [\u003c000000002973c690\u003e] bpf_prog_load+0x13db/0x2240\n    [\u003c00000000028d1644\u003e] __sys_bpf+0x1605/0x4ce0\n    [\u003c00000000053f29bd\u003e] __x64_sys_bpf+0x75/0xb0\n    [\u003c0000000056fedaf5\u003e] do_syscall_64+0x35/0x80\n    [\u003c000000002bd58261\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf, verificador: Se corrige una fuga de memoria en la reasignaci\u00f3n de matriz para el estado de la pila. Si krealloc() devuelve un error (NULL), los usuarios de realloc_array() establec\u00edan sus punteros de asignaci\u00f3n en NULL, pero en caso de error, krealloc() no modifica la asignaci\u00f3n original. Esto provocar\u00eda una fuga de recursos de memoria. En su lugar, se libera la asignaci\u00f3n anterior en la ruta de gesti\u00f3n de errores. La informaci\u00f3n de fuga de memoria es la siguiente, tal como lo inform\u00f3 Zhengchao: objeto sin referencia 0xffff888019801800 (tama\u00f1o 256): comm \"bpf_repo\", pid 6490, jiffies 4294959200 (edad 17.170s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [\u0026lt;00000000b211474b\u0026gt;] __kmalloc_node_track_caller+0x45/0xc0 [\u0026lt;0000000086712a0b\u0026gt;] krealloc+0x83/0xd0 [\u0026lt;00000000139aab02\u0026gt;] realloc_array+0x82/0xe2 [\u0026lt;00000000b1ca41d1\u0026gt;] grow_stack_state+0xfb/0x186 [\u0026lt;00000000cd6f36d2\u0026gt;] check_mem_access.cold+0x141/0x1341 [\u0026lt;0000000081780455\u0026gt;] do_check_common+0x5358/0xb350 [\u0026lt;0000000015f6b091\u0026gt;] bpf_check.cold+0xc3/0x29d [\u0026lt;000000002973c690\u0026gt;] bpf_prog_load+0x13db/0x2240 [\u0026lt;00000000028d1644\u0026gt;] __sys_bpf+0x1605/0x4ce0 [\u0026lt;00000000053f29bd\u0026gt;] __x64_sys_bpf+0x75/0xb0 [\u0026lt;0000000056fedaf5\u0026gt;] do_syscall_64+0x35/0x80 [\u0026lt;000000002bd58261\u0026gt;] entry_SYSCALL_64_after_hwframe+0x63/0xcd "
    }
  ],
  "id": "CVE-2022-49878",
  "lastModified": "2026-06-17T05:19:23.973",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-49878",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-10-01T16:02:47.368598Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-05-01T15:16:12.753",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/06615967d4889b08b19ff3dda96e8b131282f73d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/3e210891c4a4c2d858cd6f9f61d5809af251d4df"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/42378a9ca55347102bbf86708776061d8fe3ece2"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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