Vulnerability-Lookup

FKIE_CVE-2025-38405

Vulnerability from fkie_nvd - Published: 2025-07-25 14:15 - Updated: 2026-07-30 06:23

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

Summary

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix memory leak of bio integrity If nvmet receives commands with metadata there is a continuous memory leak of kmalloc-128 slab or more precisely bio->bi_integrity. Since commit bf4c89fc8797 ("block: don't call bio_uninit from bio_endio") each user of bio_init has to use bio_uninit as well. Otherwise the bio integrity is not getting free. Nvmet uses bio_init for inline bios. Uninit the inline bio to complete deallocation of integrity in bio.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/190f4c2c863af7cc5bb354b70e0805f06419c038	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2e2028fcf924d1c6df017033c8d6e28b735a0508	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/431e58d56fcb5ff1f9eb630724a922e0d2a941df	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.16
linux	linux_kernel	6.16
linux	linux_kernel	6.16
linux	linux_kernel	6.16

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/target/nvmet.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
            {
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              "version": "bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "64149da0fddbbfe43e11c0348d8c8b4171dae3a2",
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            },
            {
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              "version": "6.10.10",
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            }
          ]
        },
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          "programFiles": [
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          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "6.11"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.12.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
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      ],
      "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\nnvmet: fix memory leak of bio integrity\n\nIf nvmet receives commands with metadata there is a continuous memory\nleak of kmalloc-128 slab or more precisely bio-\u003ebi_integrity.\n\nSince commit bf4c89fc8797 (\"block: don\u0027t call bio_uninit from bio_endio\")\neach user of bio_init has to use bio_uninit as well. Otherwise the bio\nintegrity is not getting free. Nvmet uses bio_init for inline bios.\n\nUninit the inline bio to complete deallocation of integrity in bio."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nvmet: se corrige una fuga de memoria de la integridad de la bio. Si nvmet recibe comandos con metadatos, se produce una fuga de memoria continua de la slab kmalloc-128 o, m\u00e1s precisamente, bio-\u0026gt;bi_integrity. Desde el commit bf4c89fc8797 (\"bloqueo: no llamar a bio_uninit desde bio_endio\"), cada usuario de bio_init debe usar tambi\u00e9n bio_uninit. De lo contrario, la integridad de la bio no se libera. nvmet usa bio_init para la bios en l\u00ednea. Desinicie la bios en l\u00ednea para completar la desasignaci\u00f3n de la integridad en la bio."
    }
  ],
  "id": "CVE-2025-38405",
  "lastModified": "2026-07-30T06:23:12.530",
  "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",
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        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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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",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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  },
  "published": "2025-07-25T14:15:32.077",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/190f4c2c863af7cc5bb354b70e0805f06419c038"
    },
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2025-38405 (GCVE-0-2025-38405)

Vulnerability from cvelistv5 – Published: 2025-07-25 13:12 – Updated: 2026-08-05 12:01

Title

nvmet: fix memory leak of bio integrity

Summary

Severity

7.5 (High)


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

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/431e58d56fcb5ff1f…
https://git.kernel.org/stable/c/2e2028fcf924d1c6d…
https://git.kernel.org/stable/c/190f4c2c863af7cc5…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f , < 431e58d56fcb5ff1f9eb630724a922e0d2a941df (git) Affected: bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f , < 2e2028fcf924d1c6df017033c8d6e28b735a0508 (git) Affected: bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f , < 190f4c2c863af7cc5bb354b70e0805f06419c038 (git) Affected: 64149da0fddbbfe43e11c0348d8c8b4171dae3a2 (git) Affected: 6.10.10 , < 6.11 (semver)
Linux	Linux	Affected: 6.11 Unaffected: 0 , < 6.11 (semver) Unaffected: 6.12.37 , ≤ 6.12.* (semver) Unaffected: 6.15.6 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/target/nvmet.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "version": "6.10.10",
              "versionType": "semver"
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        },
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          "product": "Linux",
          "programFiles": [
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          ],
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          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.11"
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              "version": "0",
              "versionType": "semver"
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              "version": "6.12.37",
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              "version": "6.15.6",
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              "lang": "en",
              "value": "AV:N - The leak is driven entirely by NVMe commands received by the nvmet target from a remote host, and the affected metadata/PI path is only reachable via nvmet-rdma (the sole transport setting NVMF_METADATA_SUPPORTED), which runs over routable RoCEv2/iWARP fabrics. No local access to the target is needed.\nAC:L - Every read/write command carrying protection information leaks a bip allocation with 100% reliability \u2014 no race, no memory-layout dependency, and the attacker fully controls the I/O size that selects the vulnerable inline-bio path. Repetition to exhaust memory is unconstrained.\nPR:N - NVMe-oF requires no authentication by default; the target admits hosts based on a client-supplied, trivially spoofable host NQN or with allow_any_host enabled, so an unauthenticated remote peer can establish a queue and issue I/O.\nUI:N - The leak occurs purely from processing attacker-sent NVMe I/O commands; no action by any local user or administrator is required once the target is serving.\nS:U - The leaked kernel slab memory and its consequences are confined to the kernel of the target host; no security boundary such as a hypervisor or IOMMU domain is crossed.\nC:N - The orphaned bio_integrity_payload is never re-read or exposed, and no out-of-bounds or uninitialized data is returned to the attacker, so there is no information disclosure.\nI:N - bio_init() resets bi_integrity to NULL on reuse, so the leak causes no use-after-free, double-free, or any other memory corruption \u2014 no kernel data is modified.\nA:H - The leak is unbounded and driven at line-rate I/O speed by the remote attacker, so sustained traffic exhausts kernel slab memory leading to OOM kills, allocation failures and system hang/panic on the storage target."
            }
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        "dateUpdated": "2026-08-05T12:01:38.515Z",
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      ],
      "title": "nvmet: fix memory leak of bio integrity",
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        "engine": "bippy-1.2.0"
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    "datePublished": "2025-07-25T13:12:07.926Z",
    "dateReserved": "2025-04-16T04:51:24.012Z",
    "dateUpdated": "2026-08-05T12:01:38.515Z",
    "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.