Vulnerability-Lookup

FKIE_CVE-2023-53643

Vulnerability from fkie_nvd - Published: 2025-10-07 16:15 - Updated: 2026-08-04 10:19

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-tcp: don't access released socket during error recovery While the error recovery work is temporarily failing reconnect attempts, running the 'nvme list' command causes a kernel NULL pointer dereference by calling getsockname() with a released socket. During error recovery work, the nvme tcp socket is released and a new one created, so it is not safe to access the socket without proper check.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/76d54bf20cdcc1ed7569a89885e09636e9a8d71d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d82f762db4776fa11de88018f0f5de2d5db72a72	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fe2d9e54165dadaa0d0cc3355c0be9c3e129fa0d	Patch

Impacted products

	Vendor	Product	Version
	linux	linux_kernel	*
	linux	linux_kernel	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fe2d9e54165dadaa0d0cc3355c0be9c3e129fa0d",
              "status": "affected",
              "version": "02c57a82c0081141abc19150beab48ef47f97f18",
              "versionType": "git"
            },
            {
              "lessThan": "d82f762db4776fa11de88018f0f5de2d5db72a72",
              "status": "affected",
              "version": "02c57a82c0081141abc19150beab48ef47f97f18",
              "versionType": "git"
            },
            {
              "lessThan": "76d54bf20cdcc1ed7569a89885e09636e9a8d71d",
              "status": "affected",
              "version": "02c57a82c0081141abc19150beab48ef47f97f18",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "lessThan": "6.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E5630603-E179-4468-AD0D-45FD417E6EDB",
              "versionEndExcluding": "6.1.18",
              "versionStartIncluding": "6.1",
              "vulnerable": true
            },
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0575B33B-A320-4E51-84CA-10C937341E02",
              "versionEndExcluding": "6.2.5",
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              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
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    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: don\u0027t access released socket during error recovery\n\nWhile the error recovery work is temporarily failing reconnect attempts,\nrunning the \u0027nvme list\u0027 command causes a kernel NULL pointer dereference\nby calling getsockname() with a released socket.\n\nDuring error recovery work, the nvme tcp socket is released and a new one\ncreated, so it is not safe to access the socket without proper check."
    }
  ],
  "id": "CVE-2023-53643",
  "lastModified": "2026-08-04T10:19:16.050",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "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",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-10-07T16:15:47.643",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/76d54bf20cdcc1ed7569a89885e09636e9a8d71d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d82f762db4776fa11de88018f0f5de2d5db72a72"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/fe2d9e54165dadaa0d0cc3355c0be9c3e129fa0d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2023-53643 (GCVE-0-2023-53643)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:19 – Updated: 2026-08-05 09:15

Title

nvme-tcp: don't access released socket during error recovery

Summary

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/fe2d9e54165dadaa0…
https://git.kernel.org/stable/c/d82f762db4776fa11…
https://git.kernel.org/stable/c/76d54bf20cdcc1ed7…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 02c57a82c0081141abc19150beab48ef47f97f18 , < fe2d9e54165dadaa0d0cc3355c0be9c3e129fa0d (git) Affected: 02c57a82c0081141abc19150beab48ef47f97f18 , < d82f762db4776fa11de88018f0f5de2d5db72a72 (git) Affected: 02c57a82c0081141abc19150beab48ef47f97f18 , < 76d54bf20cdcc1ed7569a89885e09636e9a8d71d (git)
Linux	Linux	Affected: 6.1 Unaffected: 0 , < 6.1 (semver) Unaffected: 6.1.18 , ≤ 6.1.* (semver) Unaffected: 6.2.5 , ≤ 6.2.* (semver) Unaffected: 6.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fe2d9e54165dadaa0d0cc3355c0be9c3e129fa0d",
              "status": "affected",
              "version": "02c57a82c0081141abc19150beab48ef47f97f18",
              "versionType": "git"
            },
            {
              "lessThan": "d82f762db4776fa11de88018f0f5de2d5db72a72",
              "status": "affected",
              "version": "02c57a82c0081141abc19150beab48ef47f97f18",
              "versionType": "git"
            },
            {
              "lessThan": "76d54bf20cdcc1ed7569a89885e09636e9a8d71d",
              "status": "affected",
              "version": "02c57a82c0081141abc19150beab48ef47f97f18",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "lessThan": "6.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
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                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "6.1",
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: don\u0027t access released socket during error recovery\n\nWhile the error recovery work is temporarily failing reconnect attempts,\nrunning the \u0027nvme list\u0027 command causes a kernel NULL pointer dereference\nby calling getsockname() with a released socket.\n\nDuring error recovery work, the nvme tcp socket is released and a new one\ncreated, so it is not safe to access the socket without proper check."
        }
      ],
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            {
              "lang": "en",
              "value": "AV:L - The dereference is reached only through a local sysfs read of `/sys/class/nvme/nvmeX/address`, which invokes `nvme_tcp_get_address()`; a remote peer can induce the vulnerable state by dropping the fabric connection but cannot itself complete the trigger.\nAC:L - The bad state persists for the full 10-second default reconnect_delay and recurs for up to 600 seconds of ctrl_loss_tmo, and the world-readable `state` attribute lets the attacker observe the `connecting` window and time the read deterministically \u2014 the commit itself reports a plain `nvme list` reproducing it.\nPR:L - The `address` attribute is `S_IRUGO` (0444), so any unprivileged local account can read it; no capability, namespace trick, or device access is needed.\nUI:N - The attacker performs the sysfs read directly and needs no victim action; the same crash also occurs unaided from routine monitoring tools such as `nvme list`.\nS:U - Impact is confined to the kernel of the host running the NVMe-TCP initiator, with no crossing of a VM, IOMMU, or other security-authority boundary.\nC:H - `nvme_tcp_free_queue()` releases the socket without clearing `queue-\u003esock`, so `kernel_getsockname()` reads `ops` and address data from freed `sock_inode_cache` memory that an unprivileged user can reclaim by spraying sockets, and the result is copied into the world-readable sysfs buffer, disclosing kernel/other-socket state.\nI:H - The use-after-free performs an indirect call through `sock-\u003eops-\u003egetname` loaded from freed, reclaimable slab memory, giving a control-flow hijack primitive once the attacker grooms the reclaimed object.\nA:H - In the common case `queue-\u003esock` is NULL or points at a released socket with `ops` cleared, so the read produces an immediate kernel NULL pointer dereference and oops/panic, repeatable on demand."
            }
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    "cveId": "CVE-2023-53643",
    "datePublished": "2025-10-07T15:19:42.374Z",
    "dateReserved": "2025-10-07T15:16:59.658Z",
    "dateUpdated": "2026-08-05T09:15:19.014Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

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.