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CVE-2022-49927 (GCVE-0-2022-49927)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:11 – Updated: 2026-05-11 19:09
VLAI
Title
nfs4: Fix kmemleak when allocate slot failed
Summary
In the Linux kernel, the following vulnerability has been resolved: nfs4: Fix kmemleak when allocate slot failed If one of the slot allocate failed, should cleanup all the other allocated slots, otherwise, the allocated slots will leak: unreferenced object 0xffff8881115aa100 (size 64): comm ""mount.nfs"", pid 679, jiffies 4294744957 (age 115.037s) hex dump (first 32 bytes): 00 cc 19 73 81 88 ff ff 00 a0 5a 11 81 88 ff ff ...s......Z..... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000007a4c434a>] nfs4_find_or_create_slot+0x8e/0x130 [<000000005472a39c>] nfs4_realloc_slot_table+0x23f/0x270 [<00000000cd8ca0eb>] nfs40_init_client+0x4a/0x90 [<00000000128486db>] nfs4_init_client+0xce/0x270 [<000000008d2cacad>] nfs4_set_client+0x1a2/0x2b0 [<000000000e593b52>] nfs4_create_server+0x300/0x5f0 [<00000000e4425dd2>] nfs4_try_get_tree+0x65/0x110 [<00000000d3a6176f>] vfs_get_tree+0x41/0xf0 [<0000000016b5ad4c>] path_mount+0x9b3/0xdd0 [<00000000494cae71>] __x64_sys_mount+0x190/0x1d0 [<000000005d56bdec>] do_syscall_64+0x35/0x80 [<00000000687c9ae4>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 14:56 UTC
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: abf79bb341bf52f75f295b850abdf5f78f584311 , < 84b5cb476903003ae9ca88f32b57ff0eaefa6d4c (git)
Affected: abf79bb341bf52f75f295b850abdf5f78f584311 , < aae35a0c8a775fa4afa6a4e7dab3f936f1f89bbb (git)
Affected: abf79bb341bf52f75f295b850abdf5f78f584311 , < 86ce0e93cf6fb4d0c447323ac66577c642628b9d (git)
Affected: abf79bb341bf52f75f295b850abdf5f78f584311 , < 925cb538bd5851154602818dc80bf4b4d924c127 (git)
Affected: abf79bb341bf52f75f295b850abdf5f78f584311 , < 45aea4fbf61e205649c29200726b9f45c1718a67 (git)
Affected: abf79bb341bf52f75f295b850abdf5f78f584311 , < 24641993a7dce6b1628645f4e1d97ca06c9f765d (git)
Affected: abf79bb341bf52f75f295b850abdf5f78f584311 , < db333ae981fb8843c383aa7dbf62cc682597d401 (git)
Affected: abf79bb341bf52f75f295b850abdf5f78f584311 , < 7e8436728e22181c3f12a5dbabd35ed3a8b8c593 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.12
Unaffected: 0 , < 3.12 (semver)
Unaffected: 4.9.333 , ≤ 4.9.* (semver)
Unaffected: 4.14.299 , ≤ 4.14.* (semver)
Unaffected: 4.19.265 , ≤ 4.19.* (semver)
Unaffected: 5.4.224 , ≤ 5.4.* (semver)
Unaffected: 5.10.154 , ≤ 5.10.* (semver)
Unaffected: 5.15.78 , ≤ 5.15.* (semver)
Unaffected: 6.0.8 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                    "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
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfs4: Fix kmemleak when allocate slot failed\n\nIf one of the slot allocate failed, should cleanup all the other\nallocated slots, otherwise, the allocated slots will leak:\n\n  unreferenced object 0xffff8881115aa100 (size 64):\n    comm \"\"mount.nfs\"\", pid 679, jiffies 4294744957 (age 115.037s)\n    hex dump (first 32 bytes):\n      00 cc 19 73 81 88 ff ff 00 a0 5a 11 81 88 ff ff  ...s......Z.....\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003c000000007a4c434a\u003e] nfs4_find_or_create_slot+0x8e/0x130\n      [\u003c000000005472a39c\u003e] nfs4_realloc_slot_table+0x23f/0x270\n      [\u003c00000000cd8ca0eb\u003e] nfs40_init_client+0x4a/0x90\n      [\u003c00000000128486db\u003e] nfs4_init_client+0xce/0x270\n      [\u003c000000008d2cacad\u003e] nfs4_set_client+0x1a2/0x2b0\n      [\u003c000000000e593b52\u003e] nfs4_create_server+0x300/0x5f0\n      [\u003c00000000e4425dd2\u003e] nfs4_try_get_tree+0x65/0x110\n      [\u003c00000000d3a6176f\u003e] vfs_get_tree+0x41/0xf0\n      [\u003c0000000016b5ad4c\u003e] path_mount+0x9b3/0xdd0\n      [\u003c00000000494cae71\u003e] __x64_sys_mount+0x190/0x1d0\n      [\u003c000000005d56bdec\u003e] do_syscall_64+0x35/0x80\n      [\u003c00000000687c9ae4\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfs4: Se corrige kmemleak cuando falla la asignaci\u00f3n de ranura Si falla la asignaci\u00f3n de una ranura, se deben limpiar todas las dem\u00e1s ranuras asignadas, de lo contrario, las ranuras asignadas tendr\u00e1n fugas: objeto sin referencia 0xffff8881115aa100 (tama\u00f1o 64): comm \"\"mount.nfs\"\", pid 679, jiffies 4294744957 (edad 115.037s) volcado hexadecimal (primeros 32 bytes): 00 cc 19 73 81 88 ff ff 00 a0 5a 11 81 88 ff ff ...s......Z..... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ seguimiento inverso:[\u0026lt;000000007a4c434a\u0026gt;] nfs4_find_or_create_slot+0x8e/0x130 [\u0026lt;000000005472a39c\u0026gt;] nfs4_realloc_slot_table+0x23f/0x270 [\u0026lt;00000000cd8ca0eb\u0026gt;] nfs40_init_client+0x4a/0x90 [\u0026lt;00000000128486db\u0026gt;] nfs4_init_client+0xce/0x270 [\u0026lt;000000008d2cacad\u0026gt;] nfs4_set_client+0x1a2/0x2b0 [\u0026lt;000000000e593b52\u0026gt;] nfs4_create_server+0x300/0x5f0 [\u0026lt;00000000e4425dd2\u0026gt;] nfs4_try_get_tree+0x65/0x110 [\u0026lt;00000000d3a6176f\u0026gt;] vfs_get_tree+0x41/0xf0 [\u0026lt;0000000016b5ad4c\u0026gt;] path_mount+0x9b3/0xdd0 [\u0026lt;00000000494cae71\u0026gt;] __x64_sys_mount+0x190/0x1d0 [\u0026lt;000000005d56bdec\u0026gt;] do_syscall_64+0x35/0x80 [\u0026lt;00000000687c9ae4\u0026gt;] entry_SYSCALL_64_after_hwframe+0x46/0xb0 "
          }
        ],
        "id": "CVE-2022-49927",
        "lastModified": "2026-06-17T05:19:32.623",
        "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",
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              "impactScore": 3.6,
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                "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"
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              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
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          ],
          "ssvcV203": [
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              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
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                "options": [
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                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T14:56:42.974569Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-05-01T15:16:18.657",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
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          },
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
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          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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              "Patch"
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            "url": "https://git.kernel.org/stable/c/db333ae981fb8843c383aa7dbf62cc682597d401"
          }
        ],
        "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"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:38:17+00:00",
      "cve": "CVE-2022-49927",
      "id": "CVE-2022-49927",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nfs4: Fix kmemleak when allocate slot failed",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49927.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "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"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-49927",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-10-01T14:56:42.974569Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-401",
                    "description": "CWE-401 Missing Release of Memory after Effective Lifetime",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-10-01T14:17:52.407Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "fs/nfs/nfs4client.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
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                  "versionType": "git"
                },
                {
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                  "status": "affected",
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                  "versionType": "git"
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                {
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                  "versionType": "git"
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              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
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              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "3.12"
                },
                {
                  "lessThan": "3.12",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.9.*",
                  "status": "unaffected",
                  "version": "4.9.333",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.14.*",
                  "status": "unaffected",
                  "version": "4.14.299",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.19.*",
                  "status": "unaffected",
                  "version": "4.19.265",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.224",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.154",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.78",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.0.*",
                  "status": "unaffected",
                  "version": "6.0.8",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.1",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.9.333",
                      "versionStartIncluding": "3.12",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.14.299",
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                      "vulnerable": true
                    },
                    {
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                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                    {
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                    },
                    {
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                      "versionEndExcluding": "6.1",
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                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfs4: Fix kmemleak when allocate slot failed\n\nIf one of the slot allocate failed, should cleanup all the other\nallocated slots, otherwise, the allocated slots will leak:\n\n  unreferenced object 0xffff8881115aa100 (size 64):\n    comm \"\"mount.nfs\"\", pid 679, jiffies 4294744957 (age 115.037s)\n    hex dump (first 32 bytes):\n      00 cc 19 73 81 88 ff ff 00 a0 5a 11 81 88 ff ff  ...s......Z.....\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003c000000007a4c434a\u003e] nfs4_find_or_create_slot+0x8e/0x130\n      [\u003c000000005472a39c\u003e] nfs4_realloc_slot_table+0x23f/0x270\n      [\u003c00000000cd8ca0eb\u003e] nfs40_init_client+0x4a/0x90\n      [\u003c00000000128486db\u003e] nfs4_init_client+0xce/0x270\n      [\u003c000000008d2cacad\u003e] nfs4_set_client+0x1a2/0x2b0\n      [\u003c000000000e593b52\u003e] nfs4_create_server+0x300/0x5f0\n      [\u003c00000000e4425dd2\u003e] nfs4_try_get_tree+0x65/0x110\n      [\u003c00000000d3a6176f\u003e] vfs_get_tree+0x41/0xf0\n      [\u003c0000000016b5ad4c\u003e] path_mount+0x9b3/0xdd0\n      [\u003c00000000494cae71\u003e] __x64_sys_mount+0x190/0x1d0\n      [\u003c000000005d56bdec\u003e] do_syscall_64+0x35/0x80\n      [\u003c00000000687c9ae4\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T08:48:57.290Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/84b5cb476903003ae9ca88f32b57ff0eaefa6d4c"
            },
            {
              "url": "https://git.kernel.org/stable/c/aae35a0c8a775fa4afa6a4e7dab3f936f1f89bbb"
            },
            {
              "url": "https://git.kernel.org/stable/c/86ce0e93cf6fb4d0c447323ac66577c642628b9d"
            },
            {
              "url": "https://git.kernel.org/stable/c/925cb538bd5851154602818dc80bf4b4d924c127"
            },
            {
              "url": "https://git.kernel.org/stable/c/45aea4fbf61e205649c29200726b9f45c1718a67"
            },
            {
              "url": "https://git.kernel.org/stable/c/24641993a7dce6b1628645f4e1d97ca06c9f765d"
            },
            {
              "url": "https://git.kernel.org/stable/c/db333ae981fb8843c383aa7dbf62cc682597d401"
            },
            {
              "url": "https://git.kernel.org/stable/c/7e8436728e22181c3f12a5dbabd35ed3a8b8c593"
            }
          ],
          "title": "nfs4: Fix kmemleak when allocate slot failed",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49927",
        "datePublished": "2025-05-01T14:11:05.404Z",
        "dateReserved": "2025-05-01T14:05:17.253Z",
        "dateUpdated": "2025-10-01T14:56:45.495Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.