Vulnerability-Lookup

FKIE_CVE-2024-27435

Vulnerability from fkie_nvd - Published: 2024-05-17 13:15 - Updated: 2026-08-04 11:17

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: nvme: fix reconnection fail due to reserved tag allocation We found a issue on production environment while using NVMe over RDMA, admin_q reconnect failed forever while remote target and network is ok. After dig into it, we found it may caused by a ABBA deadlock due to tag allocation. In my case, the tag was hold by a keep alive request waiting inside admin_q, as we quiesced admin_q while reset ctrl, so the request maked as idle and will not process before reset success. As fabric_q shares tagset with admin_q, while reconnect remote target, we need a tag for connect command, but the only one reserved tag was held by keep alive command which waiting inside admin_q. As a result, we failed to reconnect admin_q forever. In order to fix this issue, I think we should keep two reserved tags for admin queue.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/262da920896e2f2ab0e3947d9dbee0aa09045818	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6851778504cdb49431809b4ba061903d5f592c96	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/de105068fead55ed5c07ade75e9c8e7f86a00d1d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ff2f90f88d78559802466ad1c84ac5bda4416b3a	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/262da920896e2f2ab0e3947d9dbee0aa09045818	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/6851778504cdb49431809b4ba061903d5f592c96	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/de105068fead55ed5c07ade75e9c8e7f86a00d1d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/ff2f90f88d78559802466ad1c84ac5bda4416b3a	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.12
linux	linux_kernel	5.12
linux	linux_kernel	5.12
linux	linux_kernel	5.12
linux	linux_kernel	5.12
linux	linux_kernel	5.12

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/core.c",
            "drivers/nvme/host/fabrics.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
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            },
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              "versionType": "git"
            },
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        },
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              "status": "unaffected",
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            },
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              "status": "unaffected",
              "version": "6.6.23",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.7.11",
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            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix reconnection fail due to reserved tag allocation\n\nWe found a issue on production environment while using NVMe over RDMA,\nadmin_q reconnect failed forever while remote target and network is ok.\nAfter dig into it, we found it may caused by a ABBA deadlock due to tag\nallocation. In my case, the tag was hold by a keep alive request\nwaiting inside admin_q, as we quiesced admin_q while reset ctrl, so the\nrequest maked as idle and will not process before reset success. As\nfabric_q shares tagset with admin_q, while reconnect remote target, we\nneed a tag for connect command, but the only one reserved tag was held\nby keep alive command which waiting inside admin_q. As a result, we\nfailed to reconnect admin_q forever. In order to fix this issue, I\nthink we should keep two reserved tags for admin queue."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: nvme: se corrigi\u00f3 el error de reconexi\u00f3n debido a la asignaci\u00f3n de etiquetas reservadas. Encontramos un problema en el entorno de producci\u00f3n al usar NVMe sobre RDMA, la reconexi\u00f3n de admin_q fall\u00f3 para siempre mientras el objetivo remoto y la red est\u00e1n bien. Despu\u00e9s de investigarlo, descubrimos que puede deberse a un punto muerto de ABBA debido a la asignaci\u00f3n de etiquetas. En mi caso, la etiqueta estaba retenida por una solicitud de mantenimiento en espera dentro de admin_q, ya que desactivamos admin_q mientras reiniciamos Ctrl, por lo que la solicitud se realiz\u00f3 como inactiva y no se procesar\u00e1 antes de que el reinicio se realice correctamente. Como fabric_q comparte el conjunto de etiquetas con admin_q, mientras reconectamos el objetivo remoto, necesitamos una etiqueta para el comando de conexi\u00f3n, pero la \u00fanica etiqueta reservada estaba mantenida por el comando Keep Alive que esperaba dentro de admin_q. Como resultado, no pudimos volver a conectar admin_q para siempre. Para solucionar este problema, creo que deber\u00edamos mantener dos etiquetas reservadas para la cola de administraci\u00f3n."
    }
  ],
  "id": "CVE-2024-27435",
  "lastModified": "2026-08-04T11:17:49.960",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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      {
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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        "type": "Secondary"
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          "options": [
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            {
              "automatable": "no"
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            {
              "technicalImpact": "partial"
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          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-05-31T18:39:12.435774Z",
          "version": "2.0.3"
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  "published": "2024-05-17T13:15:58.073",
  "references": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}

CVE-2024-27435 (GCVE-0-2024-27435)

Vulnerability from cvelistv5 – Published: 2024-05-17 12:12 – Updated: 2026-08-05 11:29

Title

nvme: fix reconnection fail due to reserved tag allocation

Summary

Severity

7.5 (High)


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

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/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 2024-05-31 18:39 UTC

CWE

CWE-noinfo Not enough information

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

5 references

URL	Tags
https://git.kernel.org/stable/c/149afee5c7418ec5d…
https://git.kernel.org/stable/c/ff2f90f88d7855980…
https://git.kernel.org/stable/c/6851778504cdb4943…
https://git.kernel.org/stable/c/262da920896e2f2ab…
https://git.kernel.org/stable/c/de105068fead55ed5…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ed01fee283a067c72b2d6500046080dbc1bb9dae , < 149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8 (git) Affected: ed01fee283a067c72b2d6500046080dbc1bb9dae , < ff2f90f88d78559802466ad1c84ac5bda4416b3a (git) Affected: ed01fee283a067c72b2d6500046080dbc1bb9dae , < 6851778504cdb49431809b4ba061903d5f592c96 (git) Affected: ed01fee283a067c72b2d6500046080dbc1bb9dae , < 262da920896e2f2ab0e3947d9dbee0aa09045818 (git) Affected: ed01fee283a067c72b2d6500046080dbc1bb9dae , < de105068fead55ed5c07ade75e9c8e7f86a00d1d (git)
Linux	Linux	Affected: 5.12 Unaffected: 0 , < 5.12 (semver) Unaffected: 6.1.83 , ≤ 6.1.* (semver) Unaffected: 6.6.23 , ≤ 6.6.* (semver) Unaffected: 6.7.11 , ≤ 6.7.* (semver) Unaffected: 6.8.2 , ≤ 6.8.* (semver) Unaffected: 6.9 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
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              "confidentialityImpact": "NONE",
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              "userInteraction": "NONE",
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                "options": [
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                "lang": "en",
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        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-06T16:36:56.843Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/core.c",
            "drivers/nvme/host/fabrics.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8",
              "status": "affected",
              "version": "ed01fee283a067c72b2d6500046080dbc1bb9dae",
              "versionType": "git"
            },
            {
              "lessThan": "ff2f90f88d78559802466ad1c84ac5bda4416b3a",
              "status": "affected",
              "version": "ed01fee283a067c72b2d6500046080dbc1bb9dae",
              "versionType": "git"
            },
            {
              "lessThan": "6851778504cdb49431809b4ba061903d5f592c96",
              "status": "affected",
              "version": "ed01fee283a067c72b2d6500046080dbc1bb9dae",
              "versionType": "git"
            },
            {
              "lessThan": "262da920896e2f2ab0e3947d9dbee0aa09045818",
              "status": "affected",
              "version": "ed01fee283a067c72b2d6500046080dbc1bb9dae",
              "versionType": "git"
            },
            {
              "lessThan": "de105068fead55ed5c07ade75e9c8e7f86a00d1d",
              "status": "affected",
              "version": "ed01fee283a067c72b2d6500046080dbc1bb9dae",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/core.c",
            "drivers/nvme/host/fabrics.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.83",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.23",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.11",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.2",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix reconnection fail due to reserved tag allocation\n\nWe found a issue on production environment while using NVMe over RDMA,\nadmin_q reconnect failed forever while remote target and network is ok.\nAfter dig into it, we found it may caused by a ABBA deadlock due to tag\nallocation. In my case, the tag was hold by a keep alive request\nwaiting inside admin_q, as we quiesced admin_q while reset ctrl, so the\nrequest maked as idle and will not process before reset success. As\nfabric_q shares tagset with admin_q, while reconnect remote target, we\nneed a tag for connect command, but the only one reserved tag was held\nby keep alive command which waiting inside admin_q. As a result, we\nfailed to reconnect admin_q forever. In order to fix this issue, I\nthink we should keep two reserved tags for admin queue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The affected code is the NVMe-over-Fabrics host driver (nvme-tcp/nvme-rdma/nvme-fc), and the controller reset that opens the race window is triggered directly from remote peer input \u2014 `nvme_tcp_state_change()` fires error recovery on a peer FIN/RST, and the receive path calls `nvme_tcp_error_recovery()` on any malformed PDU. A remote or on-path attacker against the NVMe/TCP connection (port 4420) can drive the vulnerable path without local access.\nAC:L - The attacker controls the reset side of the race and can force error recovery/reconnect cycles arbitrarily many times (reconnect re-arms the keep-alive timer each round), while the keep-alive period is deterministic at kato/2, so the window can be hit by retry and by timing; the bug was also observed occurring spontaneously in production. Once won, the leaked reserved tag is permanent \u2014 no further conditions are needed.\nPR:N - No credentials on the victim host are required \u2014 the triggering events (TCP FIN/RST, malformed NVMe/TCP PDU, unresponsive target) are handled by `nvme_tcp_state_change()` and the recv path before or independent of any NVMe-level authentication, and NVMe/TCP deployments commonly run with no DH-HMAC-CHAP or TLS at all.\nUI:N - Exploitation requires no action from any user or administrator; an already-established NVMe-oF connection is a system configuration precondition, not victim interaction, and the keep-alive/reset machinery runs autonomously in kernel workqueues.\nS:U - The impact is confined to the kernel and the host\u0027s own storage stack \u2014 no security authority boundary such as a VM, IOMMU, or sandbox is crossed.\nC:N - The defect is a reserved-tag leak causing an ABBA allocation deadlock; no memory is read out of bounds, no freed object is accessed, and no kernel data is disclosed to the attacker.\nI:N - There is no memory corruption, out-of-bounds write, or control-flow primitive \u2014 the only consequence is that a blk-mq tag is never returned, so no attacker-influenced data modification is possible.\nA:H - The admin queue can never reconnect (\"failed to reconnect admin_q forever\"), because the admin tagset is not reallocated on reconnect and the connect command\u0027s reserved tag allocation fails with -EAGAIN indefinitely, producing a permanent loss of the NVMe-oF storage path plus eventual controller deletion (and a hung, unkillable teardown worker blocked on queue freeze) \u2014 total availability loss for storage that is frequently the system\u0027s root or primary data volume."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:29:48.601Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8"
        },
        {
          "url": "https://git.kernel.org/stable/c/ff2f90f88d78559802466ad1c84ac5bda4416b3a"
        },
        {
          "url": "https://git.kernel.org/stable/c/6851778504cdb49431809b4ba061903d5f592c96"
        },
        {
          "url": "https://git.kernel.org/stable/c/262da920896e2f2ab0e3947d9dbee0aa09045818"
        },
        {
          "url": "https://git.kernel.org/stable/c/de105068fead55ed5c07ade75e9c8e7f86a00d1d"
        }
      ],
      "title": "nvme: fix reconnection fail due to reserved tag allocation",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-27435",
    "datePublished": "2024-05-17T12:12:36.439Z",
    "dateReserved": "2024-02-25T13:47:42.687Z",
    "dateUpdated": "2026-08-05T11:29:48.601Z",
    "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.

Vulnerability timeline

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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.
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