CVE-2021-47158 (GCVE-0-2021-47158)

Vulnerability from cvelistv5 – Published: 2024-03-25 09:16 – Updated: 2026-08-05 08:46
VLAI
Title
net: dsa: sja1105: add error handling in sja1105_setup()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: dsa: sja1105: add error handling in sja1105_setup() If any of sja1105_static_config_load(), sja1105_clocking_setup() or sja1105_devlink_setup() fails, we can't just return in the middle of sja1105_setup() or memory will leak. Add a cleanup path.
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: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:54 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8aa9ebccae87621d997707e4f25e53fddd7e30e4 , < dd8609f203448ca6d58ae71461208b3f6b0329b0 (git)
Affected: 8aa9ebccae87621d997707e4f25e53fddd7e30e4 , < 987e4ab8b8a4fcbf783069e03e7524cd39ffd563 (git)
Affected: 8aa9ebccae87621d997707e4f25e53fddd7e30e4 , < cec279a898a3b004411682f212215ccaea1cd0fb (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.10.42 , ≤ 5.10.* (semver)
Unaffected: 5.12.9 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:24:39.943Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47158",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:54:47.842191Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:55.376Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/dsa/sja1105/sja1105_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "dd8609f203448ca6d58ae71461208b3f6b0329b0",
              "status": "affected",
              "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4",
              "versionType": "git"
            },
            {
              "lessThan": "987e4ab8b8a4fcbf783069e03e7524cd39ffd563",
              "status": "affected",
              "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4",
              "versionType": "git"
            },
            {
              "lessThan": "cec279a898a3b004411682f212215ccaea1cd0fb",
              "status": "affected",
              "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/dsa/sja1105/sja1105_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.42",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.12.9",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: sja1105: add error handling in sja1105_setup()\n\nIf any of sja1105_static_config_load(), sja1105_clocking_setup() or\nsja1105_devlink_setup() fails, we can\u0027t just return in the middle of\nsja1105_setup() or memory will leak. Add a cleanup path."
        }
      ],
      "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 bug is in the SJA1105 SPI DSA driver probe path (sja1105_probe \u2192 dsa_register_switch \u2192 sja1105_setup), not in packet processing; exploitation is local via driver (re)bind failure and subsequent access to the leftover /dev/ptpN device.\nAC:L - The error path is deterministic once static_config_load/clocking_setup/devlink_setup fails after PTP registration (e.g., -ENOMEM or SPI failure), and the resulting dangling PTP clock can be exercised reliably through standard PTP ioctls with no race beyond attacker influence.\nPR:L - On automotive/industrial SJA1105 systems, a mid-setup failure leaves a registered PTP clock after demv frees priv; an unprivileged local user who can open /dev/ptpN (ptp_open has no capability check) can then trigger the UAF without needing CAP_SYS_ADMIN.\nUI:N - No victim action is required; the attacker drives probe-failure conditions and/or opens the dangling PTP device and issues ioctls themselves.\nS:U - Impact is confined to kernel memory corruption within the same host kernel authority; this is not a VM escape, IOMMU bypass, or other cross-boundary break.\nC:H - After demv releases priv while ptp-\u003einfo still points into it, PTP ioctls (e.g. GETCAPS/gettime) dereference freed ptp_clock_info, yielding a UAF that can be reclaimed and read for arbitrary kernel memory disclosure.\nI:H - The dangling ptp_clock_info holds function pointers (adjfine/gettimex64/settime64/etc.) in freed heap; heap reuse enables control-flow hijacking through those callbacks, so integrity impact is High.\nA:H - Use-after-free on the freed priv/ptp_data (and related timer/worker state) causes kernel oops/crash even without full exploitation, so availability impact is High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:46:22.882Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"
        },
        {
          "url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"
        },
        {
          "url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"
        }
      ],
      "title": "net: dsa: sja1105: add error handling in sja1105_setup()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47158",
    "datePublished": "2024-03-25T09:16:13.087Z",
    "dateReserved": "2024-03-25T09:12:14.109Z",
    "dateUpdated": "2026-08-05T08:46:22.882Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-47158",
      "date": "2026-09-28",
      "epss": "0.00231",
      "percentile": "0.12526"
    },
    "fkie_nvd": {
      "configurations": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "matchCriteriaId": "FE53E4D7-359D-490A-947D-77C8F22B8D18",
                  "versionEndExcluding": "5.10.42",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "matchCriteriaId": "2C8A1D02-81A7-44E5-ACFD-CC6A6694F930",
                  "versionEndExcluding": "5.12.9",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*",
                  "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*",
                  "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*",
                  "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: sja1105: add error handling in sja1105_setup()\n\nIf any of sja1105_static_config_load(), sja1105_clocking_setup() or\nsja1105_devlink_setup() fails, we can\u0027t just return in the middle of\nsja1105_setup() or memory will leak. Add a cleanup path."
        },
        {
          "lang": "es",
          "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: dsa: sja1105: agregue manejo de errores en sja1105_setup() Si alguno de sja1105_static_config_load(), sja1105_clocking_setup() o sja1105_devlink_setup() falla, no podemos simplemente regresar en el medio de sja1105_setup() o se perder\u00e1 memoria. Agregue una ruta de limpieza."
        }
      ],
      "id": "CVE-2021-47158",
      "lastModified": "2024-12-12T15:50:01.087",
      "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"
          }
        ]
      },
      "published": "2024-03-25T10:15:07.707",
      "references": [
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch"
          ],
          "url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"
        }
      ],
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Analyzed",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-401"
            }
          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/dsa/sja1105/sja1105_main.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "dd8609f203448ca6d58ae71461208b3f6b0329b0",
                    "status": "affected",
                    "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "987e4ab8b8a4fcbf783069e03e7524cd39ffd563",
                    "status": "affected",
                    "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "cec279a898a3b004411682f212215ccaea1cd0fb",
                    "status": "affected",
                    "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/dsa/sja1105/sja1105_main.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.2"
                  },
                  {
                    "lessThan": "5.2",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.42",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.12.*",
                    "status": "unaffected",
                    "version": "5.12.9",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "5.13",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FE53E4D7-359D-490A-947D-77C8F22B8D18",
                    "versionEndExcluding": "5.10.42",
                    "versionStartIncluding": "5.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "2C8A1D02-81A7-44E5-ACFD-CC6A6694F930",
                    "versionEndExcluding": "5.12.9",
                    "versionStartIncluding": "5.11",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: sja1105: add error handling in sja1105_setup()\n\nIf any of sja1105_static_config_load(), sja1105_clocking_setup() or\nsja1105_devlink_setup() fails, we can\u0027t just return in the middle of\nsja1105_setup() or memory will leak. Add a cleanup path."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: dsa: sja1105: agregue manejo de errores en sja1105_setup() Si alguno de sja1105_static_config_load(), sja1105_clocking_setup() o sja1105_devlink_setup() falla, no podemos simplemente regresar en el medio de sja1105_setup() o se perder\u00e1 memoria. Agregue una ruta de limpieza."
          }
        ],
        "id": "CVE-2021-47158",
        "lastModified": "2026-08-04T10:16:49.340",
        "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            },
            {
              "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"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2021-47158",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:54:47.842191Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-03-25T10:15:07.707",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-401"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T23:07:18+00:00",
      "cve": "CVE-2021-47158",
      "id": "CVE-2021-47158",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: dsa: sja1105: add error handling in sja1105_setup()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47158.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:58:00Z",
      "cve": "CVE-2021-47158",
      "id": "CVE-2021-47158",
      "initial_release_date": "2024-03-27T04:26:00Z",
      "product_status:known_affected": "67",
      "product_status:known_not_affected": "349",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-47158",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47158.json",
      "version": "19"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2024-08-04T05:24:39.943Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"
              },
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"
              },
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2021-47158",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-09-10T15:54:47.842191Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-09-11T12:42:19.633Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/net/dsa/sja1105/sja1105_main.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "dd8609f203448ca6d58ae71461208b3f6b0329b0",
                  "status": "affected",
                  "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4",
                  "versionType": "git"
                },
                {
                  "lessThan": "987e4ab8b8a4fcbf783069e03e7524cd39ffd563",
                  "status": "affected",
                  "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4",
                  "versionType": "git"
                },
                {
                  "lessThan": "cec279a898a3b004411682f212215ccaea1cd0fb",
                  "status": "affected",
                  "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/net/dsa/sja1105/sja1105_main.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.2"
                },
                {
                  "lessThan": "5.2",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.42",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.12.*",
                  "status": "unaffected",
                  "version": "5.12.9",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.13",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.42",
                      "versionStartIncluding": "5.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.12.9",
                      "versionStartIncluding": "5.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.13",
                      "versionStartIncluding": "5.2",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: sja1105: add error handling in sja1105_setup()\n\nIf any of sja1105_static_config_load(), sja1105_clocking_setup() or\nsja1105_devlink_setup() fails, we can\u0027t just return in the middle of\nsja1105_setup() or memory will leak. Add a cleanup path."
            }
          ],
          "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 bug is in the SJA1105 SPI DSA driver probe path (sja1105_probe \u2192 dsa_register_switch \u2192 sja1105_setup), not in packet processing; exploitation is local via driver (re)bind failure and subsequent access to the leftover /dev/ptpN device.\nAC:L - The error path is deterministic once static_config_load/clocking_setup/devlink_setup fails after PTP registration (e.g., -ENOMEM or SPI failure), and the resulting dangling PTP clock can be exercised reliably through standard PTP ioctls with no race beyond attacker influence.\nPR:L - On automotive/industrial SJA1105 systems, a mid-setup failure leaves a registered PTP clock after demv frees priv; an unprivileged local user who can open /dev/ptpN (ptp_open has no capability check) can then trigger the UAF without needing CAP_SYS_ADMIN.\nUI:N - No victim action is required; the attacker drives probe-failure conditions and/or opens the dangling PTP device and issues ioctls themselves.\nS:U - Impact is confined to kernel memory corruption within the same host kernel authority; this is not a VM escape, IOMMU bypass, or other cross-boundary break.\nC:H - After demv releases priv while ptp-\u003einfo still points into it, PTP ioctls (e.g. GETCAPS/gettime) dereference freed ptp_clock_info, yielding a UAF that can be reclaimed and read for arbitrary kernel memory disclosure.\nI:H - The dangling ptp_clock_info holds function pointers (adjfine/gettimex64/settime64/etc.) in freed heap; heap reuse enables control-flow hijacking through those callbacks, so integrity impact is High.\nA:H - Use-after-free on the freed priv/ptp_data (and related timer/worker state) causes kernel oops/crash even without full exploitation, so availability impact is High."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T08:46:22.882Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"
            },
            {
              "url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"
            },
            {
              "url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"
            }
          ],
          "title": "net: dsa: sja1105: add error handling in sja1105_setup()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47158",
        "datePublished": "2024-03-25T09:16:13.087Z",
        "dateReserved": "2024-03-25T09:12:14.109Z",
        "dateUpdated": "2026-08-05T08:46:22.882Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.