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GHSA-P7JF-WQ44-HQQ3

Vulnerability from github – Published: 2025-07-25 18:30 – Updated: 2025-11-19 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

block: reject bs > ps block devices when THP is disabled

If THP is disabled and when a block device with logical block size > page size is present, the following null ptr deref panic happens during boot:

[ [13.2 mK AOSAN: null-ptr-deref in range [0x0000000000000000-0x0000000000K0 0 0[07] [ 13.017749] RIP: 0010:create_empty_buffers+0x3b/0x380 [ 13.025448] Call Trace: [ 13.025692] [ 13.025895] block_read_full_folio+0x610/0x780 [ 13.026379] ? __pfx_blkdev_get_block+0x10/0x10 [ 13.027008] ? __folio_batch_add_and_move+0x1fa/0x2b0 [ 13.027548] ? __pfx_blkdev_read_folio+0x10/0x10 [ 13.028080] filemap_read_folio+0x9b/0x200 [ 13.028526] ? __pfx_filemap_read_folio+0x10/0x10 [ 13.029030] ? __filemap_get_folio+0x43/0x620 [ 13.029497] do_read_cache_folio+0x155/0x3b0 [ 13.029962] ? __pfx_blkdev_read_folio+0x10/0x10 [ 13.030381] read_part_sector+0xb7/0x2a0 [ 13.030805] read_lba+0x174/0x2c0 [ 13.045348] nvme_scan_ns+0x684/0x850 [nvme_core] [ 13.045858] ? __pfx_nvme_scan_ns+0x10/0x10 [nvme_core] [ 13.046414] ? _raw_spin_unlock+0x15/0x40 [ 13.046843] ? __switch_to+0x523/0x10a0 [ 13.047253] ? kvm_clock_get_cycles+0x14/0x30 [ 13.047742] ? __pfx_nvme_scan_ns_async+0x10/0x10 [nvme_core] [ 13.048353] async_run_entry_fn+0x96/0x4f0 [ 13.048787] process_one_work+0x667/0x10a0 [ 13.049219] worker_thread+0x63c/0xf60

As large folio support depends on THP, only allow bs > ps block devices if THP is enabled.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38442"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-25T16:15:29Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: reject bs \u003e ps block devices when THP is disabled\n\nIf THP is disabled and when a block device with logical block size \u003e\npage size is present, the following null ptr deref panic happens during\nboot:\n\n[   [13.2 mK  AOSAN: null-ptr-deref in range [0x0000000000000000-0x0000000000K0 0 0[07]\n[   13.017749] RIP: 0010:create_empty_buffers+0x3b/0x380\n\u003csnip\u003e\n[   13.025448] Call Trace:\n[   13.025692]  \u003cTASK\u003e\n[   13.025895]  block_read_full_folio+0x610/0x780\n[   13.026379]  ? __pfx_blkdev_get_block+0x10/0x10\n[   13.027008]  ? __folio_batch_add_and_move+0x1fa/0x2b0\n[   13.027548]  ? __pfx_blkdev_read_folio+0x10/0x10\n[   13.028080]  filemap_read_folio+0x9b/0x200\n[   13.028526]  ? __pfx_filemap_read_folio+0x10/0x10\n[   13.029030]  ? __filemap_get_folio+0x43/0x620\n[   13.029497]  do_read_cache_folio+0x155/0x3b0\n[   13.029962]  ? __pfx_blkdev_read_folio+0x10/0x10\n[   13.030381]  read_part_sector+0xb7/0x2a0\n[   13.030805]  read_lba+0x174/0x2c0\n\u003csnip\u003e\n[   13.045348]  nvme_scan_ns+0x684/0x850 [nvme_core]\n[   13.045858]  ? __pfx_nvme_scan_ns+0x10/0x10 [nvme_core]\n[   13.046414]  ? _raw_spin_unlock+0x15/0x40\n[   13.046843]  ? __switch_to+0x523/0x10a0\n[   13.047253]  ? kvm_clock_get_cycles+0x14/0x30\n[   13.047742]  ? __pfx_nvme_scan_ns_async+0x10/0x10 [nvme_core]\n[   13.048353]  async_run_entry_fn+0x96/0x4f0\n[   13.048787]  process_one_work+0x667/0x10a0\n[   13.049219]  worker_thread+0x63c/0xf60\n\nAs large folio support depends on THP, only allow bs \u003e ps block devices\nif THP is enabled.",
  "id": "GHSA-p7jf-wq44-hqq3",
  "modified": "2025-11-19T18:31:16Z",
  "published": "2025-07-25T18:30:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38442"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4cdf1bdd45ac78a088773722f009883af30ad318"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b025d81b96bfe8a62b6e3e6ac776608206ccbf6d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-38442 (GCVE-0-2025-38442)

Vulnerability from cvelistv5 – Published: 2025-07-25 15:27 – Updated: 2026-05-11 21:28

Title

block: reject bs > ps block devices when THP is disabled

Summary

In the Linux kernel, the following vulnerability has been resolved: block: reject bs > ps block devices when THP is disabled If THP is disabled and when a block device with logical block size > page size is present, the following null ptr deref panic happens during boot: [ [13.2 mK AOSAN: null-ptr-deref in range [0x0000000000000000-0x0000000000K0 0 0[07] [ 13.017749] RIP: 0010:create_empty_buffers+0x3b/0x380 <snip> [ 13.025448] Call Trace: [ 13.025692] <TASK> [ 13.025895] block_read_full_folio+0x610/0x780 [ 13.026379] ? __pfx_blkdev_get_block+0x10/0x10 [ 13.027008] ? __folio_batch_add_and_move+0x1fa/0x2b0 [ 13.027548] ? __pfx_blkdev_read_folio+0x10/0x10 [ 13.028080] filemap_read_folio+0x9b/0x200 [ 13.028526] ? __pfx_filemap_read_folio+0x10/0x10 [ 13.029030] ? __filemap_get_folio+0x43/0x620 [ 13.029497] do_read_cache_folio+0x155/0x3b0 [ 13.029962] ? __pfx_blkdev_read_folio+0x10/0x10 [ 13.030381] read_part_sector+0xb7/0x2a0 [ 13.030805] read_lba+0x174/0x2c0 <snip> [ 13.045348] nvme_scan_ns+0x684/0x850 [nvme_core] [ 13.045858] ? __pfx_nvme_scan_ns+0x10/0x10 [nvme_core] [ 13.046414] ? _raw_spin_unlock+0x15/0x40 [ 13.046843] ? __switch_to+0x523/0x10a0 [ 13.047253] ? kvm_clock_get_cycles+0x14/0x30 [ 13.047742] ? __pfx_nvme_scan_ns_async+0x10/0x10 [nvme_core] [ 13.048353] async_run_entry_fn+0x96/0x4f0 [ 13.048787] process_one_work+0x667/0x10a0 [ 13.049219] worker_thread+0x63c/0xf60 As large folio support depends on THP, only allow bs > ps block devices if THP is enabled.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/b025d81b96bfe8a62…
https://git.kernel.org/stable/c/4cdf1bdd45ac78a08…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 47dd67532303803a87f43195e088b3b4bcf0454d , < b025d81b96bfe8a62b6e3e6ac776608206ccbf6d (git) Affected: 47dd67532303803a87f43195e088b3b4bcf0454d , < 4cdf1bdd45ac78a088773722f009883af30ad318 (git)
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (semver) Unaffected: 6.15.7 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/blkdev.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b025d81b96bfe8a62b6e3e6ac776608206ccbf6d",
              "status": "affected",
              "version": "47dd67532303803a87f43195e088b3b4bcf0454d",
              "versionType": "git"
            },
            {
              "lessThan": "4cdf1bdd45ac78a088773722f009883af30ad318",
              "status": "affected",
              "version": "47dd67532303803a87f43195e088b3b4bcf0454d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/blkdev.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.7",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: reject bs \u003e ps block devices when THP is disabled\n\nIf THP is disabled and when a block device with logical block size \u003e\npage size is present, the following null ptr deref panic happens during\nboot:\n\n[   [13.2 mK  AOSAN: null-ptr-deref in range [0x0000000000000000-0x0000000000K0 0 0[07]\n[   13.017749] RIP: 0010:create_empty_buffers+0x3b/0x380\n\u003csnip\u003e\n[   13.025448] Call Trace:\n[   13.025692]  \u003cTASK\u003e\n[   13.025895]  block_read_full_folio+0x610/0x780\n[   13.026379]  ? __pfx_blkdev_get_block+0x10/0x10\n[   13.027008]  ? __folio_batch_add_and_move+0x1fa/0x2b0\n[   13.027548]  ? __pfx_blkdev_read_folio+0x10/0x10\n[   13.028080]  filemap_read_folio+0x9b/0x200\n[   13.028526]  ? __pfx_filemap_read_folio+0x10/0x10\n[   13.029030]  ? __filemap_get_folio+0x43/0x620\n[   13.029497]  do_read_cache_folio+0x155/0x3b0\n[   13.029962]  ? __pfx_blkdev_read_folio+0x10/0x10\n[   13.030381]  read_part_sector+0xb7/0x2a0\n[   13.030805]  read_lba+0x174/0x2c0\n\u003csnip\u003e\n[   13.045348]  nvme_scan_ns+0x684/0x850 [nvme_core]\n[   13.045858]  ? __pfx_nvme_scan_ns+0x10/0x10 [nvme_core]\n[   13.046414]  ? _raw_spin_unlock+0x15/0x40\n[   13.046843]  ? __switch_to+0x523/0x10a0\n[   13.047253]  ? kvm_clock_get_cycles+0x14/0x30\n[   13.047742]  ? __pfx_nvme_scan_ns_async+0x10/0x10 [nvme_core]\n[   13.048353]  async_run_entry_fn+0x96/0x4f0\n[   13.048787]  process_one_work+0x667/0x10a0\n[   13.049219]  worker_thread+0x63c/0xf60\n\nAs large folio support depends on THP, only allow bs \u003e ps block devices\nif THP is enabled."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:28:05.220Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/b025d81b96bfe8a62b6e3e6ac776608206ccbf6d"
        },
        {
          "url": "https://git.kernel.org/stable/c/4cdf1bdd45ac78a088773722f009883af30ad318"
        }
      ],
      "title": "block: reject bs \u003e ps block devices when THP is disabled",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38442",
    "datePublished": "2025-07-25T15:27:26.009Z",
    "dateReserved": "2025-04-16T04:51:24.016Z",
    "dateUpdated": "2026-05-11T21:28:05.220Z",
    "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.
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