CVE-2023-52752 (GCVE-0-2023-52752)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:30 – Updated: 2026-08-05 09:11
VLAI
Title
smb: client: fix use-after-free bug in cifs_debug_data_proc_show()
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-after-free bug in cifs_debug_data_proc_show() Skip SMB sessions that are being teared down (e.g. @ses->ses_status == SES_EXITING) in cifs_debug_data_proc_show() to avoid use-after-free in @ses. This fixes the following GPF when reading from /proc/fs/cifs/DebugData while mounting and umounting [ 816.251274] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6d81: 0000 [#1] PREEMPT SMP NOPTI ... [ 816.260138] Call Trace: [ 816.260329] <TASK> [ 816.260499] ? die_addr+0x36/0x90 [ 816.260762] ? exc_general_protection+0x1b3/0x410 [ 816.261126] ? asm_exc_general_protection+0x26/0x30 [ 816.261502] ? cifs_debug_tcon+0xbd/0x240 [cifs] [ 816.261878] ? cifs_debug_tcon+0xab/0x240 [cifs] [ 816.262249] cifs_debug_data_proc_show+0x516/0xdb0 [cifs] [ 816.262689] ? seq_read_iter+0x379/0x470 [ 816.262995] seq_read_iter+0x118/0x470 [ 816.263291] proc_reg_read_iter+0x53/0x90 [ 816.263596] ? srso_alias_return_thunk+0x5/0x7f [ 816.263945] vfs_read+0x201/0x350 [ 816.264211] ksys_read+0x75/0x100 [ 816.264472] do_syscall_64+0x3f/0x90 [ 816.264750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 816.265135] RIP: 0033:0x7fd5e669d381
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: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-22 17:22 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7f48558e6489d032b1584b0cc9ac4bb11072c034 , < 2abdf136784b7edaec7ffe0f4b461b63f9c4c4de (git)
Affected: 7f48558e6489d032b1584b0cc9ac4bb11072c034 , < 336a066990bb3962c46daf574ace596bda9303ce (git)
Affected: 7f48558e6489d032b1584b0cc9ac4bb11072c034 , < 558817597d5fbd7af31f891b67b0fd20f0d047b7 (git)
Affected: 7f48558e6489d032b1584b0cc9ac4bb11072c034 , < 89929ea46f9cc11ba66d2c64713aa5d5dc723b09 (git)
Affected: 7f48558e6489d032b1584b0cc9ac4bb11072c034 , < 0ab6f842452ce2cae04209d4671ac6289d0aef8a (git)
Affected: 7f48558e6489d032b1584b0cc9ac4bb11072c034 , < d328c09ee9f15ee5a26431f5aad7c9239fa85e62 (git)
Affected: a67172a013953664b1dad03c648200c70b90506c (git)
Affected: 3.12.48 , < 3.13 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 3.13
Unaffected: 0 , < 3.13 (semver)
Unaffected: 5.10.237 , ≤ 5.10.* (semver)
Unaffected: 5.15.181 , ≤ 5.15.* (semver)
Unaffected: 6.1.64 , ≤ 6.1.* (semver)
Unaffected: 6.5.13 , ≤ 6.5.* (semver)
Unaffected: 6.6.3 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
linux linux_kernel Unaffected: 6.7
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Create a notification for this product.
linux linux_kernel Unaffected: 6.6.3
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Create a notification for this product.
linux linux_kernel Affected: 1da177e4c3f4
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 6.1.64
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Create a notification for this product.
linux linux_kernel Unaffected: 6.5.13
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-after-free bug in cifs_debug_data_proc_show()\n\nSkip SMB sessions that are being teared down\n(e.g. @ses-\u003eses_status == SES_EXITING) in cifs_debug_data_proc_show()\nto avoid use-after-free in @ses.\n\nThis fixes the following GPF when reading from /proc/fs/cifs/DebugData\nwhile mounting and umounting\n\n  [ 816.251274] general protection fault, probably for non-canonical\n  address 0x6b6b6b6b6b6b6d81: 0000 [#1] PREEMPT SMP NOPTI\n  ...\n  [  816.260138] Call Trace:\n  [  816.260329]  \u003cTASK\u003e\n  [  816.260499]  ? die_addr+0x36/0x90\n  [  816.260762]  ? exc_general_protection+0x1b3/0x410\n  [  816.261126]  ? asm_exc_general_protection+0x26/0x30\n  [  816.261502]  ? cifs_debug_tcon+0xbd/0x240 [cifs]\n  [  816.261878]  ? cifs_debug_tcon+0xab/0x240 [cifs]\n  [  816.262249]  cifs_debug_data_proc_show+0x516/0xdb0 [cifs]\n  [  816.262689]  ? seq_read_iter+0x379/0x470\n  [  816.262995]  seq_read_iter+0x118/0x470\n  [  816.263291]  proc_reg_read_iter+0x53/0x90\n  [  816.263596]  ? srso_alias_return_thunk+0x5/0x7f\n  [  816.263945]  vfs_read+0x201/0x350\n  [  816.264211]  ksys_read+0x75/0x100\n  [  816.264472]  do_syscall_64+0x3f/0x90\n  [  816.264750]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n  [  816.265135] RIP: 0033:0x7fd5e669d381"
        },
        {
          "lang": "es",
          "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: corrige el error de use after free en cifs_debug_data_proc_show(). Omitir sesiones SMB que se est\u00e1n eliminando (por ejemplo, @ses-\u0026gt;ses_status == SES_EXITING) en cifs_debug_data_proc_show() para evitar el use after free en @ses. Esto corrige el siguiente GPF al leer desde /proc/fs/cifs/DebugData mientras se monta y desmonta [816.251274] falla de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0x6b6b6b6b6b6b6d81: 0000 [#1] PREEMPT SMP NOPTI... [816.260138] Llamada Seguimiento: [816.260329]  [816.260499] ? die_addr+0x36/0x90 [816.260762]? exc_general_protection+0x1b3/0x410 [816.261126]? asm_exc_general_protection+0x26/0x30 [816.261502]? cifs_debug_tcon+0xbd/0x240 [cifs] [816.261878]? cifs_debug_tcon+0xab/0x240 [cifs] [816.262249] cifs_debug_data_proc_show+0x516/0xdb0 [cifs] [816.262689]? seq_read_iter+0x379/0x470 [816.262995] seq_read_iter+0x118/0x470 [816.263291] proc_reg_read_iter+0x53/0x90 [816.263596] ? srso_alias_return_thunk+0x5/0x7f [ 816.263945] vfs_read+0x201/0x350 [ 816.264211] ksys_read+0x75/0x100 [ 816.264472] do_syscall_64+0x3f/0x90 [ 816.2647 50] entrada_SYSCALL_64_after_hwframe+0x6e/0xd8 [816.265135] RIP: 0033:0x7fd5e669d381"
        }
      ],
      "id": "CVE-2023-52752",
      "lastModified": "2024-11-21T08:40:30.720",
      "metrics": {
        "cvssMetricV31": [
          {
            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "exploitabilityScore": 1.8,
            "impactScore": 5.9,
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 8.4,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "exploitabilityScore": 2.5,
            "impactScore": 5.9,
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      },
      "published": "2024-05-21T16:15:14.833",
      "references": [
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/0ab6f842452ce2cae04209d4671ac6289d0aef8a"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/558817597d5fbd7af31f891b67b0fd20f0d047b7"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "tags": [
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          "url": "https://git.kernel.org/stable/c/89929ea46f9cc11ba66d2c64713aa5d5dc723b09"
        },
        {
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          "url": "https://git.kernel.org/stable/c/d328c09ee9f15ee5a26431f5aad7c9239fa85e62"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/0ab6f842452ce2cae04209d4671ac6289d0aef8a"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch"
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          "url": "https://git.kernel.org/stable/c/558817597d5fbd7af31f891b67b0fd20f0d047b7"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/89929ea46f9cc11ba66d2c64713aa5d5dc723b09"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/d328c09ee9f15ee5a26431f5aad7c9239fa85e62"
        }
      ],
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Modified",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-416"
            }
          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        },
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-416"
            }
          ],
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "type": "Secondary"
        }
      ]
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-19T01:41:21.000Z",
      "cve": "CVE-2023-52752",
      "id": "msrc_CVE-2023-52752",
      "initial_release_date": "2024-05-02T07:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "smb: client: fix use-after-free bug in cifs_debug_data_proc_show()",
      "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2023-52752.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "fs/smb/client/cifs_debug.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "2abdf136784b7edaec7ffe0f4b461b63f9c4c4de",
                    "status": "affected",
                    "version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "336a066990bb3962c46daf574ace596bda9303ce",
                    "status": "affected",
                    "version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "558817597d5fbd7af31f891b67b0fd20f0d047b7",
                    "status": "affected",
                    "version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "89929ea46f9cc11ba66d2c64713aa5d5dc723b09",
                    "status": "affected",
                    "version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "0ab6f842452ce2cae04209d4671ac6289d0aef8a",
                    "status": "affected",
                    "version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "d328c09ee9f15ee5a26431f5aad7c9239fa85e62",
                    "status": "affected",
                    "version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "a67172a013953664b1dad03c648200c70b90506c",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "3.13",
                    "status": "affected",
                    "version": "3.12.48",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "fs/smb/client/cifs_debug.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "3.13"
                  },
                  {
                    "lessThan": "3.13",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.237",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.181",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.64",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.5.*",
                    "status": "unaffected",
                    "version": "6.5.13",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.3",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.7",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          },
          {
            "affectedData": [
              {
                "cpes": [
                  "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
                ],
                "defaultStatus": "unknown",
                "product": "linux_kernel",
                "vendor": "linux",
                "versions": [
                  {
                    "status": "unaffected",
                    "version": "6.7"
                  }
                ]
              },
              {
                "cpes": [
                  "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
                ],
                "defaultStatus": "unknown",
                "product": "linux_kernel",
                "vendor": "linux",
                "versions": [
                  {
                    "status": "unaffected",
                    "version": "6.6.3"
                  }
                ]
              },
              {
                "cpes": [
                  "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
                ],
                "defaultStatus": "unknown",
                "product": "linux_kernel",
                "vendor": "linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "1da177e4c3f4"
                  }
                ]
              },
              {
                "cpes": [
                  "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
                ],
                "defaultStatus": "unknown",
                "product": "linux_kernel",
                "vendor": "linux",
                "versions": [
                  {
                    "status": "unaffected",
                    "version": "6.1.64"
                  }
                ]
              },
              {
                "cpes": [
                  "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
                ],
                "defaultStatus": "unknown",
                "product": "linux_kernel",
                "vendor": "linux",
                "versions": [
                  {
                    "status": "unaffected",
                    "version": "6.5.13"
                  }
                ]
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A97CFFC1-1A90-4594-A6D8-FE2823A7BB24",
                    "versionEndExcluding": "5.10.237",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "12331C9E-F601-4EFC-899E-369F98DCC70B",
                    "versionEndExcluding": "5.15.181",
                    "versionStartIncluding": "5.11",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "8D7C884A-CAA2-4EA2-9FEB-5CE776D7B05F",
                    "versionEndExcluding": "6.1.64",
                    "versionStartIncluding": "5.16",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "674C4F82-C336-4B49-BF64-1DE422E889C4",
                    "versionEndExcluding": "6.5.13",
                    "versionStartIncluding": "6.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B58252FA-A49C-411F-9B28-DC5FE44BC5A0",
                    "versionEndExcluding": "6.6.3",
                    "versionStartIncluding": "6.6",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-after-free bug in cifs_debug_data_proc_show()\n\nSkip SMB sessions that are being teared down\n(e.g. @ses-\u003eses_status == SES_EXITING) in cifs_debug_data_proc_show()\nto avoid use-after-free in @ses.\n\nThis fixes the following GPF when reading from /proc/fs/cifs/DebugData\nwhile mounting and umounting\n\n  [ 816.251274] general protection fault, probably for non-canonical\n  address 0x6b6b6b6b6b6b6d81: 0000 [#1] PREEMPT SMP NOPTI\n  ...\n  [  816.260138] Call Trace:\n  [  816.260329]  \u003cTASK\u003e\n  [  816.260499]  ? die_addr+0x36/0x90\n  [  816.260762]  ? exc_general_protection+0x1b3/0x410\n  [  816.261126]  ? asm_exc_general_protection+0x26/0x30\n  [  816.261502]  ? cifs_debug_tcon+0xbd/0x240 [cifs]\n  [  816.261878]  ? cifs_debug_tcon+0xab/0x240 [cifs]\n  [  816.262249]  cifs_debug_data_proc_show+0x516/0xdb0 [cifs]\n  [  816.262689]  ? seq_read_iter+0x379/0x470\n  [  816.262995]  seq_read_iter+0x118/0x470\n  [  816.263291]  proc_reg_read_iter+0x53/0x90\n  [  816.263596]  ? srso_alias_return_thunk+0x5/0x7f\n  [  816.263945]  vfs_read+0x201/0x350\n  [  816.264211]  ksys_read+0x75/0x100\n  [  816.264472]  do_syscall_64+0x3f/0x90\n  [  816.264750]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n  [  816.265135] RIP: 0033:0x7fd5e669d381"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: corrige el error de use after free en cifs_debug_data_proc_show(). Omitir sesiones SMB que se est\u00e1n eliminando (por ejemplo, @ses-\u0026gt;ses_status == SES_EXITING) en cifs_debug_data_proc_show() para evitar el use after free en @ses. Esto corrige el siguiente GPF al leer desde /proc/fs/cifs/DebugData mientras se monta y desmonta [816.251274] falla de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0x6b6b6b6b6b6b6d81: 0000 [#1] PREEMPT SMP NOPTI... [816.260138] Llamada Seguimiento: [816.260329]  [816.260499] ? die_addr+0x36/0x90 [816.260762]? exc_general_protection+0x1b3/0x410 [816.261126]? asm_exc_general_protection+0x26/0x30 [816.261502]? cifs_debug_tcon+0xbd/0x240 [cifs] [816.261878]? cifs_debug_tcon+0xab/0x240 [cifs] [816.262249] cifs_debug_data_proc_show+0x516/0xdb0 [cifs] [816.262689]? seq_read_iter+0x379/0x470 [816.262995] seq_read_iter+0x118/0x470 [816.263291] proc_reg_read_iter+0x53/0x90 [816.263596] ? srso_alias_return_thunk+0x5/0x7f [ 816.263945] vfs_read+0x201/0x350 [ 816.264211] ksys_read+0x75/0x100 [ 816.264472] do_syscall_64+0x3f/0x90 [ 816.2647 50] entrada_SYSCALL_64_after_hwframe+0x6e/0xd8 [816.265135] RIP: 0033:0x7fd5e669d381"
          }
        ],
        "id": "CVE-2023-52752",
        "lastModified": "2026-06-17T06:43:30.193",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2023-52752",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-22T17:22:07.851461Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-05-21T16:15:14.833",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0ab6f842452ce2cae04209d4671ac6289d0aef8a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
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                    "timestamp": "2024-05-22T17:22:07.851461Z",
                    "version": "2.0.3"
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                  "type": "ssvc"
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              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-after-free bug in cifs_debug_data_proc_show()\n\nSkip SMB sessions that are being teared down\n(e.g. @ses-\u003eses_status == SES_EXITING) in cifs_debug_data_proc_show()\nto avoid use-after-free in @ses.\n\nThis fixes the following GPF when reading from /proc/fs/cifs/DebugData\nwhile mounting and umounting\n\n  [ 816.251274] general protection fault, probably for non-canonical\n  address 0x6b6b6b6b6b6b6d81: 0000 [#1] PREEMPT SMP NOPTI\n  ...\n  [  816.260138] Call Trace:\n  [  816.260329]  \u003cTASK\u003e\n  [  816.260499]  ? die_addr+0x36/0x90\n  [  816.260762]  ? exc_general_protection+0x1b3/0x410\n  [  816.261126]  ? asm_exc_general_protection+0x26/0x30\n  [  816.261502]  ? cifs_debug_tcon+0xbd/0x240 [cifs]\n  [  816.261878]  ? cifs_debug_tcon+0xab/0x240 [cifs]\n  [  816.262249]  cifs_debug_data_proc_show+0x516/0xdb0 [cifs]\n  [  816.262689]  ? seq_read_iter+0x379/0x470\n  [  816.262995]  seq_read_iter+0x118/0x470\n  [  816.263291]  proc_reg_read_iter+0x53/0x90\n  [  816.263596]  ? srso_alias_return_thunk+0x5/0x7f\n  [  816.263945]  vfs_read+0x201/0x350\n  [  816.264211]  ksys_read+0x75/0x100\n  [  816.264472]  do_syscall_64+0x3f/0x90\n  [  816.264750]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n  [  816.265135] RIP: 0033:0x7fd5e669d381"
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                  "value": "AV:L - The vulnerable code is reached by reading /proc/fs/cifs/DebugData via local syscalls (vfs_read \u2192 seq_read_iter \u2192 cifs_debug_data_proc_show), not by processing remote SMB packets; this is the CIFS client debug interface.\nAC:L - The attacker can control both sides of the race by concurrently mounting/unmounting CIFS shares while repeatedly reading DebugData, making the UAF reliably triggerable without depending on unrelated system state.\nPR:L - DebugData is created with mode 0 which becomes world-readable (0444), so any unprivileged local user can hit the vulnerable show path; session teardown is reachable without real root via user/setuid CIFS mounts or multiuser-mount session prune.\nUI:N - No victim action is required; the attacker alone can open/read the proc file and induce session teardown through their own mount/session activity.\nS:U - This is a standard in-kernel UAF enabling local privilege escalation within the same host kernel authority; it does not cross VM, IOMMU, or other security boundaries.\nC:H - Use-after-free of session/tcon objects (demonstrated via SLAB poison 0x6b\u2026 in cifs_debug_tcon) allows reclaim and attacker-controlled contents, enabling arbitrary kernel memory disclosure.\nI:H - The same UAF of heap objects used during debug iteration can be turned into write/control-flow primitives via heap spraying, enabling integrity compromise and code execution in the kernel.\nA:H - The bug causes a kernel general protection fault/oops when freed tcon memory is accessed, so availability impact is a full kernel crash even without further exploitation."
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        "cveId": "CVE-2023-52752",
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}



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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.



Related by attack behaviour

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.