CVE-2021-47102 (GCVE-0-2021-47102)

Vulnerability from cvelistv5 – Published: 2024-03-04 18:10 – Updated: 2026-08-05 08:45
VLAI
Title
net: marvell: prestera: fix incorrect structure access
Summary
In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix incorrect structure access In line: upper = info->upper_dev; We access upper_dev field, which is related only for particular events (e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory access for another events, when ptr is not netdev_notifier_changeupper_info. The KASAN logs are as follows: [ 30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera] [ 30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778 [ 30.139866] [ 30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6 [ 30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT) [ 30.153056] Call trace: [ 30.155547] dump_backtrace+0x0/0x2c0 [ 30.159320] show_stack+0x18/0x30 [ 30.162729] dump_stack_lvl+0x68/0x84 [ 30.166491] print_address_description.constprop.0+0x74/0x2b8 [ 30.172346] kasan_report+0x1e8/0x250 [ 30.176102] __asan_load8+0x98/0xe0 [ 30.179682] prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera] [ 30.186847] prestera_netdev_event_handler+0x1b4/0x1c0 [prestera] [ 30.193313] raw_notifier_call_chain+0x74/0xa0 [ 30.197860] call_netdevice_notifiers_info+0x68/0xc0 [ 30.202924] register_netdevice+0x3cc/0x760 [ 30.207190] register_netdev+0x24/0x50 [ 30.211015] prestera_device_register+0x8a0/0xba0 [prestera]
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-05 16:07 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3d5048cc54bd250cfbb358c37fcc011135977887 , < 5c553a0cd1263e4da5f220d80fa713fc3959c1d0 (git)
Affected: 3d5048cc54bd250cfbb358c37fcc011135977887 , < 2efc2256febf214e7b2bdaa21fe6c3c3146acdcb (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.12 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47102",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-03-05T16:07:00.454829Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:15:11.035Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:24:39.915Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/marvell/prestera/prestera_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5c553a0cd1263e4da5f220d80fa713fc3959c1d0",
              "status": "affected",
              "version": "3d5048cc54bd250cfbb358c37fcc011135977887",
              "versionType": "git"
            },
            {
              "lessThan": "2efc2256febf214e7b2bdaa21fe6c3c3146acdcb",
              "status": "affected",
              "version": "3d5048cc54bd250cfbb358c37fcc011135977887",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/marvell/prestera/prestera_main.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": "5.15.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.12",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.16",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix incorrect structure access\n\nIn line:\n\tupper = info-\u003eupper_dev;\nWe access upper_dev field, which is related only for particular events\n(e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory\naccess for another events,\nwhen ptr is not netdev_notifier_changeupper_info.\n\nThe KASAN logs are as follows:\n\n[   30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\n[   30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778\n[   30.139866]\n[   30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6\n[   30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT)\n[   30.153056] Call trace:\n[   30.155547]  dump_backtrace+0x0/0x2c0\n[   30.159320]  show_stack+0x18/0x30\n[   30.162729]  dump_stack_lvl+0x68/0x84\n[   30.166491]  print_address_description.constprop.0+0x74/0x2b8\n[   30.172346]  kasan_report+0x1e8/0x250\n[   30.176102]  __asan_load8+0x98/0xe0\n[   30.179682]  prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\n[   30.186847]  prestera_netdev_event_handler+0x1b4/0x1c0 [prestera]\n[   30.193313]  raw_notifier_call_chain+0x74/0xa0\n[   30.197860]  call_netdevice_notifiers_info+0x68/0xc0\n[   30.202924]  register_netdevice+0x3cc/0x760\n[   30.207190]  register_netdev+0x24/0x50\n[   30.211015]  prestera_device_register+0x8a0/0xba0 [prestera]"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is in a netdev notifier callback reached via local netlink/ioctl paths (register_netdev, ip link up/down, MTU/addr changes) on Marvell Prestera switch ports, not via remote packet processing.\nAC:L - Any non-CHANGEUPPER netdev event on a Prestera port reliably hits the unconditional upper_dev load; the attacker fully controls triggering those events and no race or special memory layout is required.\nPR:L - Triggering requires CAP_NET_ADMIN to manipulate Prestera netdevs (or operations in a netns where that capability is held); per kernel guidance that capability via user namespaces/containers scores as Low, not High.\nUI:N - No victim action is required; the attacker directly drives the netdev events that invoke the vulnerable notifier.\nS:U - Impact stays within the kernel on the local host; this is not a VM/IOMMU/sandbox boundary escape.\nC:H - The bug is a confirmed stack-out-of-bounds read of kernel stack memory beyond the notifier info object; under the scoring rule for OOB reads this is scored High.\nI:N - The OOB-loaded pointer is unused for the buggy event types (only PRECHANGEUPPER/CHANGEUPPER consume upper_dev, and those pass the correct structure), so there is no write or control-flow integrity impact.\nA:H - Stack OOB access is a kernel memory-safety violation that can oops/panic the kernel (as demonstrated by KASAN), yielding High availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:45:59.235Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb"
        }
      ],
      "title": "net: marvell: prestera: fix incorrect structure access",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47102",
    "datePublished": "2024-03-04T18:10:56.018Z",
    "dateReserved": "2024-02-29T22:33:44.301Z",
    "dateUpdated": "2026-08-05T08:45:59.235Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-47102",
      "date": "2026-09-21",
      "epss": "0.00332",
      "percentile": "0.26491"
    },
    "fkie_nvd": {
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix incorrect structure access\n\nIn line:\n\tupper = info-\u003eupper_dev;\nWe access upper_dev field, which is related only for particular events\n(e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory\naccess for another events,\nwhen ptr is not netdev_notifier_changeupper_info.\n\nThe KASAN logs are as follows:\n\n[   30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\n[   30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778\n[   30.139866]\n[   30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6\n[   30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT)\n[   30.153056] Call trace:\n[   30.155547]  dump_backtrace+0x0/0x2c0\n[   30.159320]  show_stack+0x18/0x30\n[   30.162729]  dump_stack_lvl+0x68/0x84\n[   30.166491]  print_address_description.constprop.0+0x74/0x2b8\n[   30.172346]  kasan_report+0x1e8/0x250\n[   30.176102]  __asan_load8+0x98/0xe0\n[   30.179682]  prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\n[   30.186847]  prestera_netdev_event_handler+0x1b4/0x1c0 [prestera]\n[   30.193313]  raw_notifier_call_chain+0x74/0xa0\n[   30.197860]  call_netdevice_notifiers_info+0x68/0xc0\n[   30.202924]  register_netdevice+0x3cc/0x760\n[   30.207190]  register_netdev+0x24/0x50\n[   30.211015]  prestera_device_register+0x8a0/0xba0 [prestera]"
        },
        {
          "lang": "es",
          "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: net:marvell:prestera: corrige el acceso a la estructura incorrecta En l\u00ednea: superior = info-\u0026gt;upper_dev; Accedemos al campo Upper_dev, que est\u00e1 relacionado s\u00f3lo para eventos particulares (por ejemplo, evento == NETDEV_CHANGEUPPER). Entonces, esta l\u00ednea causa un acceso no v\u00e1lido a la memoria para otros eventos, cuando ptr no es netdev_notifier_changeupper_info. Los registros de KASAN son los siguientes: [30.123165] ERROR: KASAN: pila fuera de los l\u00edmites en prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera] [30.133336] Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff80000cf772b0 mediante tarea udevd/778 [ 0x0/0 x2c0 [ 30.159320] show_stack+0x18/0x30 [ 30.162729] dump_stack_lvl+0x68/0x84 [ 30.166491] print_address_description.constprop.0+0x74/0x2b8 [ 30.172346] kasan_report+0x1e8/0x250 [ 3 0.176102] __asan_load8+0x98/0xe0 [ 30.179682] prestera_netdev_port_event.constprop .0+0x68/0x538 [prestera] [ 30.186847] prestera_netdev_event_handler+0x1b4/0x1c0 [prestera] [ 30.193313] raw_notifier_call_chain+0x74/0xa0 [ 30.197860] call_netdevice_notifiers_info+0x68/0xc0 [ 30.202924] registro_netdevice+0x3cc/0x760 [ 30.207190] registro_netdev+0x24 /0x50 [ 30.211015] prestera_device_register+0x8a0/0xba0 [prestera]"
        }
      ],
      "id": "CVE-2021-47102",
      "lastModified": "2024-11-21T06:35:24.150",
      "published": "2024-03-04T18:15:08.600",
      "references": [
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0"
        }
      ],
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/ethernet/marvell/prestera/prestera_main.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "5c553a0cd1263e4da5f220d80fa713fc3959c1d0",
                    "status": "affected",
                    "version": "3d5048cc54bd250cfbb358c37fcc011135977887",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "2efc2256febf214e7b2bdaa21fe6c3c3146acdcb",
                    "status": "affected",
                    "version": "3d5048cc54bd250cfbb358c37fcc011135977887",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/ethernet/marvell/prestera/prestera_main.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": "5.15.12",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "5.16",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "901A6B90-4B30-4E61-9B88-844D6E11AE47",
                    "versionEndExcluding": "5.15.12",
                    "versionStartIncluding": "5.14",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "A73429BA-C2D9-4D0C-A75F-06A1CA8B3983",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "F621B5E3-E99D-49E7-90B9-EC3B77C95383",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*",
                    "matchCriteriaId": "F7BFDCAA-1650-49AA-8462-407DD593F94F",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*",
                    "matchCriteriaId": "6EC9882F-866D-4ACB-8FBC-213D8D8436C8",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*",
                    "matchCriteriaId": "8A0915FE-A4AA-4C94-B783-CF29D81E7E54",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix incorrect structure access\n\nIn line:\n\tupper = info-\u003eupper_dev;\nWe access upper_dev field, which is related only for particular events\n(e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory\naccess for another events,\nwhen ptr is not netdev_notifier_changeupper_info.\n\nThe KASAN logs are as follows:\n\n[   30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\n[   30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778\n[   30.139866]\n[   30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6\n[   30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT)\n[   30.153056] Call trace:\n[   30.155547]  dump_backtrace+0x0/0x2c0\n[   30.159320]  show_stack+0x18/0x30\n[   30.162729]  dump_stack_lvl+0x68/0x84\n[   30.166491]  print_address_description.constprop.0+0x74/0x2b8\n[   30.172346]  kasan_report+0x1e8/0x250\n[   30.176102]  __asan_load8+0x98/0xe0\n[   30.179682]  prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\n[   30.186847]  prestera_netdev_event_handler+0x1b4/0x1c0 [prestera]\n[   30.193313]  raw_notifier_call_chain+0x74/0xa0\n[   30.197860]  call_netdevice_notifiers_info+0x68/0xc0\n[   30.202924]  register_netdevice+0x3cc/0x760\n[   30.207190]  register_netdev+0x24/0x50\n[   30.211015]  prestera_device_register+0x8a0/0xba0 [prestera]"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: net:marvell:prestera: corrige el acceso a la estructura incorrecta En l\u00ednea: superior = info-\u0026gt;upper_dev; Accedemos al campo Upper_dev, que est\u00e1 relacionado s\u00f3lo para eventos particulares (por ejemplo, evento == NETDEV_CHANGEUPPER). Entonces, esta l\u00ednea causa un acceso no v\u00e1lido a la memoria para otros eventos, cuando ptr no es netdev_notifier_changeupper_info. Los registros de KASAN son los siguientes: [30.123165] ERROR: KASAN: pila fuera de los l\u00edmites en prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera] [30.133336] Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff80000cf772b0 mediante tarea udevd/778 [ 0x0/0 x2c0 [ 30.159320] show_stack+0x18/0x30 [ 30.162729] dump_stack_lvl+0x68/0x84 [ 30.166491] print_address_description.constprop.0+0x74/0x2b8 [ 30.172346] kasan_report+0x1e8/0x250 [ 3 0.176102] __asan_load8+0x98/0xe0 [ 30.179682] prestera_netdev_port_event.constprop .0+0x68/0x538 [prestera] [ 30.186847] prestera_netdev_event_handler+0x1b4/0x1c0 [prestera] [ 30.193313] raw_notifier_call_chain+0x74/0xa0 [ 30.197860] call_netdevice_notifiers_info+0x68/0xc0 [ 30.202924] registro_netdevice+0x3cc/0x760 [ 30.207190] registro_netdev+0x24 /0x50 [ 30.211015] prestera_device_register+0x8a0/0xba0 [prestera]"
          }
        ],
        "id": "CVE-2021-47102",
        "lastModified": "2026-08-04T10:16:45.600",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.2,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.2,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2021-47102",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-03-05T16:07:00.454829Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-03-04T18:15:08.600",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Exploit",
              "Mailing List",
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Exploit",
              "Mailing List",
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Mailing List",
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Mailing List",
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-125"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T20:06:24+00:00",
      "cve": "CVE-2021-47102",
      "id": "CVE-2021-47102",
      "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: marvell: prestera: fix incorrect structure access",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47102.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-04T00:44:00Z",
      "cve": "CVE-2021-47102",
      "id": "CVE-2021-47102",
      "initial_release_date": "2024-03-07T04:44:26Z",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "264",
      "product_status:recommended": "471",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-47102",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47102.json",
      "version": "52"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2024-08-04T05:24:39.915Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0"
              },
              {
                "tags": [
                  "x_transferred"
                ],
                "url": "https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2021-47102",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-03-05T16:07:00.454829Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-05-23T19:01:15.284Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/net/ethernet/marvell/prestera/prestera_main.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "5c553a0cd1263e4da5f220d80fa713fc3959c1d0",
                  "status": "affected",
                  "version": "3d5048cc54bd250cfbb358c37fcc011135977887",
                  "versionType": "git"
                },
                {
                  "lessThan": "2efc2256febf214e7b2bdaa21fe6c3c3146acdcb",
                  "status": "affected",
                  "version": "3d5048cc54bd250cfbb358c37fcc011135977887",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/net/ethernet/marvell/prestera/prestera_main.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": "5.15.12",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.16",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.12",
                      "versionStartIncluding": "5.14",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.16",
                      "versionStartIncluding": "5.14",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix incorrect structure access\n\nIn line:\n\tupper = info-\u003eupper_dev;\nWe access upper_dev field, which is related only for particular events\n(e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory\naccess for another events,\nwhen ptr is not netdev_notifier_changeupper_info.\n\nThe KASAN logs are as follows:\n\n[   30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\n[   30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778\n[   30.139866]\n[   30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6\n[   30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT)\n[   30.153056] Call trace:\n[   30.155547]  dump_backtrace+0x0/0x2c0\n[   30.159320]  show_stack+0x18/0x30\n[   30.162729]  dump_stack_lvl+0x68/0x84\n[   30.166491]  print_address_description.constprop.0+0x74/0x2b8\n[   30.172346]  kasan_report+0x1e8/0x250\n[   30.176102]  __asan_load8+0x98/0xe0\n[   30.179682]  prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\n[   30.186847]  prestera_netdev_event_handler+0x1b4/0x1c0 [prestera]\n[   30.193313]  raw_notifier_call_chain+0x74/0xa0\n[   30.197860]  call_netdevice_notifiers_info+0x68/0xc0\n[   30.202924]  register_netdevice+0x3cc/0x760\n[   30.207190]  register_netdev+0x24/0x50\n[   30.211015]  prestera_device_register+0x8a0/0xba0 [prestera]"
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The bug is in a netdev notifier callback reached via local netlink/ioctl paths (register_netdev, ip link up/down, MTU/addr changes) on Marvell Prestera switch ports, not via remote packet processing.\nAC:L - Any non-CHANGEUPPER netdev event on a Prestera port reliably hits the unconditional upper_dev load; the attacker fully controls triggering those events and no race or special memory layout is required.\nPR:L - Triggering requires CAP_NET_ADMIN to manipulate Prestera netdevs (or operations in a netns where that capability is held); per kernel guidance that capability via user namespaces/containers scores as Low, not High.\nUI:N - No victim action is required; the attacker directly drives the netdev events that invoke the vulnerable notifier.\nS:U - Impact stays within the kernel on the local host; this is not a VM/IOMMU/sandbox boundary escape.\nC:H - The bug is a confirmed stack-out-of-bounds read of kernel stack memory beyond the notifier info object; under the scoring rule for OOB reads this is scored High.\nI:N - The OOB-loaded pointer is unused for the buggy event types (only PRECHANGEUPPER/CHANGEUPPER consume upper_dev, and those pass the correct structure), so there is no write or control-flow integrity impact.\nA:H - Stack OOB access is a kernel memory-safety violation that can oops/panic the kernel (as demonstrated by KASAN), yielding High availability impact."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T08:45:59.235Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0"
            },
            {
              "url": "https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb"
            }
          ],
          "title": "net: marvell: prestera: fix incorrect structure access",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47102",
        "datePublished": "2024-03-04T18:10:56.018Z",
        "dateReserved": "2024-02-29T22:33:44.301Z",
        "dateUpdated": "2026-08-05T08:45:59.235Z",
        "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.