CVE-2021-33909 (GCVE-0-2021-33909)

Vulnerability from cvelistv5 – Published: 2021-07-20 18:01 – Updated: 2024-08-04 00:05
VLAI
Summary
fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2316 records in the last 180 days details
References
URL Tags
https://lists.debian.org/debian-lts-announce/2021… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021… mailing-listx_refsource_MLIST
https://www.debian.org/security/2021/dsa-4941 vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://www.openwall.com/lists/oss-security/2021/07/22/7 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/0… mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/17/2 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/17/4 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/21/1 mailing-listx_refsource_MLIST
https://www.oracle.com/security-alerts/cpujan2022.html x_refsource_MISC
https://www.openwall.com/lists/oss-security/2021/… x_refsource_MISC
https://github.com/torvalds/linux/commit/8cae8cd8… x_refsource_CONFIRM
https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan… x_refsource_CONFIRM
http://packetstormsecurity.com/files/163621/Sequo… x_refsource_MISC
http://packetstormsecurity.com/files/163671/Kerne… x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021081… x_refsource_CONFIRM
http://packetstormsecurity.com/files/164155/Kerne… x_refsource_MISC
http://packetstormsecurity.com/files/165477/Kerne… x_refsource_MISC
https://psirt.global.sonicwall.com/vuln-detail/SN… x_refsource_CONFIRM
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T00:05:52.143Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-2] linux security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html"
          },
          {
            "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-1] linux security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html"
          },
          {
            "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2714-1] linux-4.19 security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html"
          },
          {
            "name": "DSA-4941",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2021/dsa-4941"
          },
          {
            "name": "FEDORA-2021-07dc0b3eb1",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/"
          },
          {
            "name": "[oss-security] 20210722 Re: CVE-2021-33909: size_t-to-int vulnerability in Linux\u0027s filesystem layer",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/07/22/7"
          },
          {
            "name": "[oss-security] 20210825 Re: CVE-2021-33909: size_t-to-int vulnerability in Linux\u0027s filesystem layer",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/08/25/10"
          },
          {
            "name": "[oss-security] 20210916 Containers-optimized OS (COS) membership in the linux-distros list",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/09/17/2"
          },
          {
            "name": "[oss-security] 20210917 Re: Containers-optimized OS (COS) membership in the linux-distros list",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/09/17/4"
          },
          {
            "name": "[oss-security] 20210920 Re: Containers-optimized OS (COS) membership in the linux-distros list",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/09/21/1"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2021/07/20/1"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210819-0004/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-08-09T21:06:18.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-2] linux security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html"
        },
        {
          "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-1] linux security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html"
        },
        {
          "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2714-1] linux-4.19 security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html"
        },
        {
          "name": "DSA-4941",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2021/dsa-4941"
        },
        {
          "name": "FEDORA-2021-07dc0b3eb1",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/"
        },
        {
          "name": "[oss-security] 20210722 Re: CVE-2021-33909: size_t-to-int vulnerability in Linux\u0027s filesystem layer",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/07/22/7"
        },
        {
          "name": "[oss-security] 20210825 Re: CVE-2021-33909: size_t-to-int vulnerability in Linux\u0027s filesystem layer",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/08/25/10"
        },
        {
          "name": "[oss-security] 20210916 Containers-optimized OS (COS) membership in the linux-distros list",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/09/17/2"
        },
        {
          "name": "[oss-security] 20210917 Re: Containers-optimized OS (COS) membership in the linux-distros list",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/09/17/4"
        },
        {
          "name": "[oss-security] 20210920 Re: Containers-optimized OS (COS) membership in the linux-distros list",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/09/21/1"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.openwall.com/lists/oss-security/2021/07/20/1"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210819-0004/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-33909",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-2] linux security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html"
            },
            {
              "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-1] linux security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html"
            },
            {
              "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2714-1] linux-4.19 security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html"
            },
            {
              "name": "DSA-4941",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2021/dsa-4941"
            },
            {
              "name": "FEDORA-2021-07dc0b3eb1",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/"
            },
            {
              "name": "[oss-security] 20210722 Re: CVE-2021-33909: size_t-to-int vulnerability in Linux\u0027s filesystem layer",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/07/22/7"
            },
            {
              "name": "[oss-security] 20210825 Re: CVE-2021-33909: size_t-to-int vulnerability in Linux\u0027s filesystem layer",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/08/25/10"
            },
            {
              "name": "[oss-security] 20210916 Containers-optimized OS (COS) membership in the linux-distros list",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/09/17/2"
            },
            {
              "name": "[oss-security] 20210917 Re: Containers-optimized OS (COS) membership in the linux-distros list",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/09/17/4"
            },
            {
              "name": "[oss-security] 20210920 Re: Containers-optimized OS (COS) membership in the linux-distros list",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/09/21/1"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpujan2022.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
            },
            {
              "name": "https://www.openwall.com/lists/oss-security/2021/07/20/1",
              "refsource": "MISC",
              "url": "https://www.openwall.com/lists/oss-security/2021/07/20/1"
            },
            {
              "name": "https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b",
              "refsource": "CONFIRM",
              "url": "https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b"
            },
            {
              "name": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4",
              "refsource": "CONFIRM",
              "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4"
            },
            {
              "name": "http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html"
            },
            {
              "name": "http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210819-0004/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210819-0004/"
            },
            {
              "name": "http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html"
            },
            {
              "name": "http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html"
            },
            {
              "name": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015",
              "refsource": "CONFIRM",
              "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-33909",
    "datePublished": "2021-07-20T18:01:34.000Z",
    "dateReserved": "2021-06-07T00:00:00.000Z",
    "dateUpdated": "2024-08-04T00:05:52.143Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-33909",
      "date": "2026-10-13",
      "epss": "0.09729",
      "percentile": "0.9543"
    },
    "microsoft_vex": {
      "current_release_date": "2021-12-16T00:00:00.000Z",
      "cve": "CVE-2021-33909",
      "id": "msrc_CVE-2021-33909",
      "initial_release_date": "2021-07-02T00:00:00.000Z",
      "product_status:fixed": "2",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations leading to an integer overflow an Out-of-bounds Write and escalation to root by an unprivileged user aka CID-8cae8cd89f05.",
      "url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-33909.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "39C4F3AF-A0E2-4B5A-8CEF-94A66639E158",
                    "versionEndExcluding": "3.13",
                    "versionStartIncluding": "3.12.43",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "EC5597FD-F068-49B5-99FE-8CDB79CD7682",
                    "versionEndExcluding": "4.4.276",
                    "versionStartIncluding": "3.16",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C79FFC06-9530-4CD7-B651-01D786CC925E",
                    "versionEndExcluding": "4.9.276",
                    "versionStartIncluding": "4.5",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FB359B2E-773D-4D52-9915-E07A47ABE72B",
                    "versionEndExcluding": "4.14.240",
                    "versionStartIncluding": "4.10",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B93AEDB9-C52B-4222-8F9A-882DAD9EF5B2",
                    "versionEndExcluding": "4.19.198",
                    "versionStartIncluding": "4.15",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "508D9771-335F-44A6-9F2F-880DF1267A1F",
                    "versionEndExcluding": "5.4.134",
                    "versionStartIncluding": "4.20",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "7C1E6FB6-53C8-4DC4-8AE5-93094BA39F62",
                    "versionEndExcluding": "5.10.52",
                    "versionStartIncluding": "5.5",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "34C1A2F4-DD44-4CF1-8FD4-751A0D746A9E",
                    "versionEndExcluding": "5.12.19",
                    "versionStartIncluding": "5.11",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F93FA3CC-0C79-410B-A7D7-245C2AA0723A",
                    "versionEndExcluding": "5.13.4",
                    "versionStartIncluding": "5.13",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A3C19813-E823-456A-B1CE-EC0684CE1953",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A6E9EF0C-AFA8-4F7B-9FDC-1E0F7C26E737",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:oracle:communications_session_border_controller:8.2:*:*:*:*:*:*:*",
                    "matchCriteriaId": "2B9F6415-2950-49FE-9CAF-8BCA4DB6DF4B",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:oracle:communications_session_border_controller:8.3:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C05190B9-237F-4E2E-91EA-DB1B738864AD",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:oracle:communications_session_border_controller:8.4:*:*:*:*:*:*:*",
                    "matchCriteriaId": "9C416FD3-2E2F-4BBC-BD5F-F896825883F4",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:oracle:communications_session_border_controller:9.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D886339E-EDB2-4879-BD54-1800E4CA9CAE",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:sonicwall:sma1000_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "7F4BE1A7-14AA-4E0F-AA13-46D3B9D48F2F",
                    "versionEndIncluding": "12.4.2-02044",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:sonicwall:sma1000:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "DB78952C-B6BB-4A5A-A216-BA64AAC83D4D",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05."
          },
          {
            "lang": "es",
            "value": "Un archivo fs/seq_file.c en el kernel de Linux versiones 3.16 hasta 5.13.x anteriores a 5.13.4, no restringe apropiadamente las asignaciones de b\u00faferes seq, conllevando a un desbordamiento de enteros, una escritura fuera de l\u00edmites y una escalada a root por parte de un usuario no privilegiado, tambi\u00e9n se conoce como CID-8cae8cd89f05"
          }
        ],
        "id": "CVE-2021-33909",
        "lastModified": "2024-11-21T06:09:45.353",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 7.2,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 10.0,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "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"
            }
          ]
        },
        "published": "2021-07-20T19:15:09.747",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit",
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/07/22/7"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/08/25/10"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/09/17/2"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/09/17/4"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/09/21/1"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210819-0004/"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2021/dsa-4941"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit",
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2021/07/20/1"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/07/22/7"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/08/25/10"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/09/17/2"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/09/17/4"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/09/21/1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210819-0004/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2021/dsa-4941"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2021/07/20/1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-190"
              },
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-07T01:07:00+00:00",
      "cve": "CVE-2021-33909",
      "id": "CVE-2021-33909",
      "initial_release_date": "2021-07-20T12:00:00+00:00",
      "product_status:fixed": "1348",
      "product_status:known_affected": "16",
      "product_status:known_not_affected": "129",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: size_t-to-int conversion vulnerability in the filesystem layer",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-33909.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.