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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
VLAI
Title
nvme: fix reconnection fail due to reserved tag allocation
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.
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
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ed01fee283a067c72b2d6500046080dbc1bb9dae , < 149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8 (git)
Affected: ed01fee283a067c72b2d6500046080dbc1bb9dae , < ff2f90f88d78559802466ad1c84ac5bda4416b3a (git)
Affected: ed01fee283a067c72b2d6500046080dbc1bb9dae , < 6851778504cdb49431809b4ba061903d5f592c96 (git)
Affected: ed01fee283a067c72b2d6500046080dbc1bb9dae , < 262da920896e2f2ab0e3947d9dbee0aa09045818 (git)
Affected: ed01fee283a067c72b2d6500046080dbc1bb9dae , < de105068fead55ed5c07ade75e9c8e7f86a00d1d (git)
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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)
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Show details on NVD website
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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. 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:07:31+00:00",
      "cve": "CVE-2024-27435",
      "id": "CVE-2024-27435",
      "initial_release_date": "2024-05-17T00:00:00+00:00",
      "product_status:fixed": "279",
      "product_status:known_affected": "98",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nvme: fix reconnection fail due to reserved tag allocation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-27435.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-30T02:40:41Z",
      "cve": "CVE-2024-27435",
      "id": "CVE-2024-27435",
      "initial_release_date": "2024-05-21T02:00:32Z",
      "product_status:known_affected": "435",
      "product_status:known_not_affected": "142",
      "product_status:recommended": "699",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-27435",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-27435.json",
      "version": "110"
    },
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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. 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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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.83\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.23\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.11\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.2\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"5.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:29:48.601Z\"}}}",
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.

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  • 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.


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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.