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GHSA-M9GH-794Q-VJJJ

Vulnerability from github – Published: 2024-11-05 18:32 – Updated: 2024-11-08 21:33

Details

In the Linux kernel, the following vulnerability has been resolved:

bpf: Add the missing BPF_LINK_TYPE invocation for sockmap

There is an out-of-bounds read in bpf_link_show_fdinfo() for the sockmap link fd. Fix it by adding the missing BPF_LINK_TYPE invocation for sockmap link

Also add comments for bpf_link_type to prevent missing updates in the future.

Severity

7.1 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50123"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-05T18:15:15Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Add the missing BPF_LINK_TYPE invocation for sockmap\n\nThere is an out-of-bounds read in bpf_link_show_fdinfo() for the sockmap\nlink fd. Fix it by adding the missing BPF_LINK_TYPE invocation for\nsockmap link\n\nAlso add comments for bpf_link_type to prevent missing updates in the\nfuture.",
  "id": "GHSA-m9gh-794q-vjjj",
  "modified": "2024-11-08T21:33:53Z",
  "published": "2024-11-05T18:32:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50123"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d79f12c0ce2bc8ff5f109093df1734bd6450615"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-50123 (GCVE-0-2024-50123)

Vulnerability from cvelistv5 – Published: 2024-11-05 17:10 – Updated: 2026-08-05 11:41

Title

bpf: Add the missing BPF_LINK_TYPE invocation for sockmap

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Add the missing BPF_LINK_TYPE invocation for sockmap There is an out-of-bounds read in bpf_link_show_fdinfo() for the sockmap link fd. Fix it by adding the missing BPF_LINK_TYPE invocation for sockmap link Also add comments for bpf_link_type to prevent missing updates in the future.

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 2025-10-01 20:21 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/6d79f12c0ce2bc8ff…
https://git.kernel.org/stable/c/c2f803052bc7a7feb…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 699c23f02c65cbfc3e638f14ce0d70c23a2e1f02 , < 6d79f12c0ce2bc8ff5f109093df1734bd6450615 (git) Affected: 699c23f02c65cbfc3e638f14ce0d70c23a2e1f02 , < c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5 (git)
Linux	Linux	Affected: 6.10 Unaffected: 0 , < 6.10 (semver) Unaffected: 6.11.6 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-50123",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
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                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T20:21:36.865150Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
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        "providerMetadata": {
          "dateUpdated": "2025-10-01T20:27:16.209Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      }
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    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bpf_types.h",
            "include/uapi/linux/bpf.h",
            "tools/include/uapi/linux/bpf.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6d79f12c0ce2bc8ff5f109093df1734bd6450615",
              "status": "affected",
              "version": "699c23f02c65cbfc3e638f14ce0d70c23a2e1f02",
              "versionType": "git"
            },
            {
              "lessThan": "c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5",
              "status": "affected",
              "version": "699c23f02c65cbfc3e638f14ce0d70c23a2e1f02",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bpf_types.h",
            "include/uapi/linux/bpf.h",
            "tools/include/uapi/linux/bpf.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11.6",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Add the missing BPF_LINK_TYPE invocation for sockmap\n\nThere is an out-of-bounds read in bpf_link_show_fdinfo() for the sockmap\nlink fd. Fix it by adding the missing BPF_LINK_TYPE invocation for\nsockmap link\n\nAlso add comments for bpf_link_type to prevent missing updates in the\nfuture."
        }
      ],
      "metrics": [
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            "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 vulnerability is reached through the bpf() syscall (BPF_MAP_CREATE/BPF_PROG_LOAD/BPF_LINK_CREATE, or BPF_OBJ_GET on a bpffs-pinned link) followed by a read of /proc/self/fdinfo/\u003cfd\u003e. There is no network-facing path to bpf_link_show_fdinfo().\nAC:L - Triggering is fully deterministic \u2014 link-\u003etype is unconditionally 14 for every sockmap link, so the out-of-bounds read at index 14 happens on every fdinfo read with no race, timing window, or memory-layout grooming required.\nPR:L - BPF token delegation (kernel 6.9+, present across the affected 6.10\u20136.11 range) routes the CAP_NET_ADMIN/CAP_BPF checks through ns_capable(token-\u003euserns, ...), letting an unprivileged user in a delegated user namespace create the sockmap link; separately, bpf_obj_get() enforces no capability check whatsoever, so any local user able to open a bpffs-pinned sockmap link obtains the fd and reads its own fdinfo.\nUI:N - The attacker performs every step \u2014 creating or opening the link and reading its fdinfo \u2014 within their own process. No victim action or interaction is required.\nS:U - The out-of-bounds read and the resulting disclosure or fault are confined to the kernel\u0027s own security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The out-of-bounds qword is dereferenced as a string by seq_printf(\"%s\") with precision -1, so string_nocheck() walks unbounded from an uncontrolled kernel address until a NUL byte and copies those kernel memory bytes into fdinfo output that userspace reads back.\nI:N - The defect is a pure read of one element past a global array; no kernel memory is written out of bounds and no attacker-controlled data modifies kernel state.\nA:H - vsnprintf only guards NULL, sub-PAGE_SIZE, and IS_ERR values, so any other adjacent .data qword becomes a wild kernel dereference and oops, and KASAN globals instrumentation turns the access into a hard report (a panic with panic_on_warn)."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:41:48.825Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5"
        }
      ],
      "title": "bpf: Add the missing BPF_LINK_TYPE invocation for sockmap",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50123",
    "datePublished": "2024-11-05T17:10:51.799Z",
    "dateReserved": "2024-10-21T19:36:19.954Z",
    "dateUpdated": "2026-08-05T11:41:48.825Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-M9GH-794Q-VJJJ

CVE-2024-50123 (GCVE-0-2024-50123)

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