Vulnerability-Lookup

GSD-2024-26638

Vulnerability from gsd - Updated: 2024-02-20 06:02

Details

In the Linux kernel, the following vulnerability has been resolved: nbd: always initialize struct msghdr completely syzbot complains that msg->msg_get_inq value can be uninitialized [1] struct msghdr got many new fields recently, we should always make sure their values is zero by default. [1] BUG: KMSAN: uninit-value in tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571 tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571 inet_recvmsg+0x131/0x580 net/ipv4/af_inet.c:879 sock_recvmsg_nosec net/socket.c:1044 [inline] sock_recvmsg+0x12b/0x1e0 net/socket.c:1066 __sock_xmit+0x236/0x5c0 drivers/block/nbd.c:538 nbd_read_reply drivers/block/nbd.c:732 [inline] recv_work+0x262/0x3100 drivers/block/nbd.c:863 process_one_work kernel/workqueue.c:2627 [inline] process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700 worker_thread+0xf45/0x1490 kernel/workqueue.c:2781 kthread+0x3ed/0x540 kernel/kthread.c:388 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Local variable msg created at: __sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513 nbd_read_reply drivers/block/nbd.c:732 [inline] recv_work+0x262/0x3100 drivers/block/nbd.c:863 CPU: 1 PID: 7465 Comm: kworker/u5:1 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Workqueue: nbd5-recv recv_work

Aliases

CVE-2024-26638

JSON

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{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2024-26638"
      ],
      "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: always initialize struct msghdr completely\n\nsyzbot complains that msg-\u003emsg_get_inq value can be uninitialized [1]\n\nstruct msghdr got many new fields recently, we should always make\nsure their values is zero by default.\n\n[1]\n BUG: KMSAN: uninit-value in tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n  tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n  inet_recvmsg+0x131/0x580 net/ipv4/af_inet.c:879\n  sock_recvmsg_nosec net/socket.c:1044 [inline]\n  sock_recvmsg+0x12b/0x1e0 net/socket.c:1066\n  __sock_xmit+0x236/0x5c0 drivers/block/nbd.c:538\n  nbd_read_reply drivers/block/nbd.c:732 [inline]\n  recv_work+0x262/0x3100 drivers/block/nbd.c:863\n  process_one_work kernel/workqueue.c:2627 [inline]\n  process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700\n  worker_thread+0xf45/0x1490 kernel/workqueue.c:2781\n  kthread+0x3ed/0x540 kernel/kthread.c:388\n  ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n  ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242\n\nLocal variable msg created at:\n  __sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513\n  nbd_read_reply drivers/block/nbd.c:732 [inline]\n  recv_work+0x262/0x3100 drivers/block/nbd.c:863\n\nCPU: 1 PID: 7465 Comm: kworker/u5:1 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\nWorkqueue: nbd5-recv recv_work",
      "id": "GSD-2024-26638",
      "modified": "2024-02-20T06:02:29.163488Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@kernel.org",
        "ID": "CVE-2024-26638",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "f94fd25cb0aa",
                          "version_value": "d9c54763e5cd"
                        },
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected",
                            "versions": [
                              {
                                "status": "affected",
                                "version": "5.19"
                              },
                              {
                                "lessThan": "5.19",
                                "status": "unaffected",
                                "version": "0",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.1.*",
                                "status": "unaffected",
                                "version": "6.1.76",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.6.*",
                                "status": "unaffected",
                                "version": "6.6.15",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.7.*",
                                "status": "unaffected",
                                "version": "6.7.3",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "*",
                                "status": "unaffected",
                                "version": "6.8",
                                "versionType": "original_commit_for_fix"
                              }
                            ]
                          }
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Linux"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: always initialize struct msghdr completely\n\nsyzbot complains that msg-\u003emsg_get_inq value can be uninitialized [1]\n\nstruct msghdr got many new fields recently, we should always make\nsure their values is zero by default.\n\n[1]\n BUG: KMSAN: uninit-value in tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n  tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n  inet_recvmsg+0x131/0x580 net/ipv4/af_inet.c:879\n  sock_recvmsg_nosec net/socket.c:1044 [inline]\n  sock_recvmsg+0x12b/0x1e0 net/socket.c:1066\n  __sock_xmit+0x236/0x5c0 drivers/block/nbd.c:538\n  nbd_read_reply drivers/block/nbd.c:732 [inline]\n  recv_work+0x262/0x3100 drivers/block/nbd.c:863\n  process_one_work kernel/workqueue.c:2627 [inline]\n  process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700\n  worker_thread+0xf45/0x1490 kernel/workqueue.c:2781\n  kthread+0x3ed/0x540 kernel/kthread.c:388\n  ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n  ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242\n\nLocal variable msg created at:\n  __sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513\n  nbd_read_reply drivers/block/nbd.c:732 [inline]\n  recv_work+0x262/0x3100 drivers/block/nbd.c:863\n\nCPU: 1 PID: 7465 Comm: kworker/u5:1 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\nWorkqueue: nbd5-recv recv_work"
          }
        ]
      },
      "generator": {
        "engine": "bippy-8df59b4913de"
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://git.kernel.org/stable/c/d9c54763e5cdbbd3f81868597fe8aca3c96e6387",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/d9c54763e5cdbbd3f81868597fe8aca3c96e6387"
          },
          {
            "name": "https://git.kernel.org/stable/c/1960f2b534da1e6c65fb96f9e98bda773495f406",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/1960f2b534da1e6c65fb96f9e98bda773495f406"
          },
          {
            "name": "https://git.kernel.org/stable/c/b0028f333420a65a53a63978522db680b37379dd",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/b0028f333420a65a53a63978522db680b37379dd"
          },
          {
            "name": "https://git.kernel.org/stable/c/78fbb92af27d0982634116c7a31065f24d092826",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/78fbb92af27d0982634116c7a31065f24d092826"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: always initialize struct msghdr completely\n\nsyzbot complains that msg-\u003emsg_get_inq value can be uninitialized [1]\n\nstruct msghdr got many new fields recently, we should always make\nsure their values is zero by default.\n\n[1]\n BUG: KMSAN: uninit-value in tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n  tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n  inet_recvmsg+0x131/0x580 net/ipv4/af_inet.c:879\n  sock_recvmsg_nosec net/socket.c:1044 [inline]\n  sock_recvmsg+0x12b/0x1e0 net/socket.c:1066\n  __sock_xmit+0x236/0x5c0 drivers/block/nbd.c:538\n  nbd_read_reply drivers/block/nbd.c:732 [inline]\n  recv_work+0x262/0x3100 drivers/block/nbd.c:863\n  process_one_work kernel/workqueue.c:2627 [inline]\n  process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700\n  worker_thread+0xf45/0x1490 kernel/workqueue.c:2781\n  kthread+0x3ed/0x540 kernel/kthread.c:388\n  ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n  ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242\n\nLocal variable msg created at:\n  __sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513\n  nbd_read_reply drivers/block/nbd.c:732 [inline]\n  recv_work+0x262/0x3100 drivers/block/nbd.c:863\n\nCPU: 1 PID: 7465 Comm: kworker/u5:1 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\nWorkqueue: nbd5-recv recv_work"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nbd: siempre inicializa completamente la estructura msghdr syzbot se queja de que el valor msg-\u0026gt;msg_get_inq puede no estar inicializado [1] la estructura msghdr obtuvo muchos campos nuevos recientemente, siempre debemos asegurarnos de que sus valores sean cero por defecto. [1] ERROR: KMSAN: valor uninit en tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571 tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571 inet_recvmsg+0x131/0x580 net/ipv4/af_inet. c:879 sock_recvmsg_nosec net/socket.c:1044 [en l\u00ednea] sock_recvmsg+0x12b/0x1e0 net/socket.c:1066 __sock_xmit+0x236/0x5c0 drivers/block/nbd.c:538 nbd_read_reply drivers/block/nbd.c:732 [en l\u00ednea] recv_work+0x262/0x3100 drivers/block/nbd.c:863 Process_one_work kernel/workqueue.c:2627 [en l\u00ednea] Process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700 workqueue.c :2781 kthread+0x3ed/0x540 kernel/kthread.c:388 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Mensaje de variable local creado en: __sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513 nbd_read_reply drivers/block/nbd.c:732 [en l\u00ednea] recv_work+0x262/0x3100 drivers/block/nbd.c:863 CPU: 1 PID: 7465 Comm : kworker/u5:1 No contaminado 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 17/11/2023 Cola de trabajo: nbd5-recv recv_work"
          }
        ],
        "id": "CVE-2024-26638",
        "lastModified": "2024-03-18T12:38:25.490",
        "metrics": {},
        "published": "2024-03-18T11:15:10.720",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/1960f2b534da1e6c65fb96f9e98bda773495f406"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/78fbb92af27d0982634116c7a31065f24d092826"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b0028f333420a65a53a63978522db680b37379dd"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d9c54763e5cdbbd3f81868597fe8aca3c96e6387"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}

CVE-2024-26638 (GCVE-0-2024-26638)

Vulnerability from cvelistv5 – Published: 2024-03-18 10:14 – Updated: 2026-05-11 20:01

Title

nbd: always initialize struct msghdr completely

Summary

Severity

4.4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-03-18 15:03 UTC

CWE

CWE-noinfo Not enough information

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/d9c54763e5cdbbd3f…
https://git.kernel.org/stable/c/1960f2b534da1e6c6…
https://git.kernel.org/stable/c/b0028f333420a65a5…
https://git.kernel.org/stable/c/78fbb92af27d09826…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f94fd25cb0aaf77fd7453f31c5d394a1a68ecf60 , < d9c54763e5cdbbd3f81868597fe8aca3c96e6387 (git) Affected: f94fd25cb0aaf77fd7453f31c5d394a1a68ecf60 , < 1960f2b534da1e6c65fb96f9e98bda773495f406 (git) Affected: f94fd25cb0aaf77fd7453f31c5d394a1a68ecf60 , < b0028f333420a65a53a63978522db680b37379dd (git) Affected: f94fd25cb0aaf77fd7453f31c5d394a1a68ecf60 , < 78fbb92af27d0982634116c7a31065f24d092826 (git)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 6.1.76 , ≤ 6.1.* (semver) Unaffected: 6.6.15 , ≤ 6.6.* (semver) Unaffected: 6.7.3 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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        "metrics": [
          {
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              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 4.4,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "HIGH",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
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                "options": [
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                "role": "CISA Coordinator",
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            }
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        "problemTypes": [
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                "lang": "en",
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          "shortName": "CISA-ADP"
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        "title": "CVE Program Container"
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    "cna": {
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          "product": "Linux",
          "programFiles": [
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: always initialize struct msghdr completely\n\nsyzbot complains that msg-\u003emsg_get_inq value can be uninitialized [1]\n\nstruct msghdr got many new fields recently, we should always make\nsure their values is zero by default.\n\n[1]\n BUG: KMSAN: uninit-value in tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n  tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2571\n  inet_recvmsg+0x131/0x580 net/ipv4/af_inet.c:879\n  sock_recvmsg_nosec net/socket.c:1044 [inline]\n  sock_recvmsg+0x12b/0x1e0 net/socket.c:1066\n  __sock_xmit+0x236/0x5c0 drivers/block/nbd.c:538\n  nbd_read_reply drivers/block/nbd.c:732 [inline]\n  recv_work+0x262/0x3100 drivers/block/nbd.c:863\n  process_one_work kernel/workqueue.c:2627 [inline]\n  process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700\n  worker_thread+0xf45/0x1490 kernel/workqueue.c:2781\n  kthread+0x3ed/0x540 kernel/kthread.c:388\n  ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147\n  ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242\n\nLocal variable msg created at:\n  __sock_xmit+0x4c/0x5c0 drivers/block/nbd.c:513\n  nbd_read_reply drivers/block/nbd.c:732 [inline]\n  recv_work+0x262/0x3100 drivers/block/nbd.c:863\n\nCPU: 1 PID: 7465 Comm: kworker/u5:1 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\nWorkqueue: nbd5-recv recv_work"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:01:17.550Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d9c54763e5cdbbd3f81868597fe8aca3c96e6387"
        },
        {
          "url": "https://git.kernel.org/stable/c/1960f2b534da1e6c65fb96f9e98bda773495f406"
        },
        {
          "url": "https://git.kernel.org/stable/c/b0028f333420a65a53a63978522db680b37379dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/78fbb92af27d0982634116c7a31065f24d092826"
        }
      ],
      "title": "nbd: always initialize struct msghdr completely",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26638",
    "datePublished": "2024-03-18T10:14:48.970Z",
    "dateReserved": "2024-02-19T14:20:24.137Z",
    "dateUpdated": "2026-05-11T20:01:17.550Z",
    "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.

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.