github - ghsa-w9w3-f8q7-x576

GHSA-W9W3-F8Q7-X576

Vulnerability from github – Published: 2022-05-24 19:06 – Updated: 2025-11-11 18:30

Details

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.

Severity ?

4.7 (Medium)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-33624"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-203",
      "CWE-843"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-06-23T16:15:00Z",
    "severity": "MODERATE"
  },
  "details": "In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.",
  "id": "GHSA-w9w3-f8q7-x576",
  "modified": "2025-11-11T18:30:13Z",
  "published": "2022-05-24T19:06:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33624"
    },
    {
      "type": "WEB",
      "url": "https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db"
    },
    {
      "type": "WEB",
      "url": "https://github.com/benschlueter/CVE-2021-33624"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html"
    },
    {
      "type": "WEB",
      "url": "https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2021/06/21/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-33624 (GCVE-0-2021-33624)

Vulnerability from cvelistv5 – Published: 2021-06-23 15:37 – Updated: 2025-11-11 15:19

Summary

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://www.usenix.org/conference/usenixsecurity2…
	http://www.openwall.com/lists/oss-security/2021/06/21/1
	https://github.com/torvalds/linux/commit/9183671a…
	https://lists.debian.org/debian-lts-announce/2021…	mailing-list
	https://github.com/benschlueter/CVE-2021-33624

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:58:21.425Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/06/21/1"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db"
          },
          {
            "name": "[debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-11T15:19:19.961Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner"
        },
        {
          "url": "http://www.openwall.com/lists/oss-security/2021/06/21/1"
        },
        {
          "url": "https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db"
        },
        {
          "name": "[debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html"
        },
        {
          "url": "https://github.com/benschlueter/CVE-2021-33624"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-33624",
          "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": "In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner",
              "refsource": "MISC",
              "url": "https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner"
            },
            {
              "name": "http://www.openwall.com/lists/oss-security/2021/06/21/1",
              "refsource": "CONFIRM",
              "url": "http://www.openwall.com/lists/oss-security/2021/06/21/1"
            },
            {
              "name": "https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db",
              "refsource": "CONFIRM",
              "url": "https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db"
            },
            {
              "name": "[debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-33624",
    "datePublished": "2021-06-23T15:37:09.000Z",
    "dateReserved": "2021-05-28T00:00:00.000Z",
    "dateUpdated": "2025-11-11T15:19:19.961Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

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

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-W9W3-F8Q7-X576

CVE-2021-33624 (GCVE-0-2021-33624)

Tags

Sightings

Nomenclature