Vulnerability-Lookup

GHSA-F89W-GG6R-RVWW

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-19 18:31

Details

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

block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()

pin_user_pages_fast() can partially succeed and return the number of pages that were actually pinned. However, the bio_integrity_map_user() does not handle this partial pinning. This leads to a general protection fault since bvec_from_pages() dereferences an unpinned page address, which is 0.

To fix this, add a check to verify that all requested memory is pinned. If partial pinning occurs, unpin the memory and return -EFAULT.

Kernel Oops:

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 UID: 0 PID: 1061 Comm: nvme-passthroug Not tainted 7.0.0-11783-g90957f9314e8-dirty #16 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014 RIP: 0010:bio_integrity_map_user.cold+0x1b0/0x9d6

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64052"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:45Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()\n\npin_user_pages_fast() can partially succeed and return the number of\npages that were actually pinned. However, the bio_integrity_map_user()\ndoes not handle this partial pinning. This leads to a general protection\nfault since bvec_from_pages() dereferences an unpinned page address,\nwhich is 0.\n\nTo fix this, add a check to verify that all requested memory is pinned.\nIf partial pinning occurs, unpin the memory and return -EFAULT.\n\nKernel Oops:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 UID: 0 PID: 1061 Comm: nvme-passthroug Not tainted 7.0.0-11783-g90957f9314e8-dirty #16 PREEMPT(lazy)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\nRIP: 0010:bio_integrity_map_user.cold+0x1b0/0x9d6",
  "id": "GHSA-f89w-gg6r-rvww",
  "modified": "2026-07-19T18:31:50Z",
  "published": "2026-07-19T18:31:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64052"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76410790f1491c8e06a451045ae223a61c652455"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77c059f41e9395793917d067476f549a911d77d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8582792cf23b3d94674d4d838f7cde9a28d0fcaf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8fa244738641d95ea4d70e6f9a62778bba42a5b7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-64052 (GCVE-0-2026-64052)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-07-19 15:39

Title

block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()

Summary

In the Linux kernel, the following vulnerability has been resolved: block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user() pin_user_pages_fast() can partially succeed and return the number of pages that were actually pinned. However, the bio_integrity_map_user() does not handle this partial pinning. This leads to a general protection fault since bvec_from_pages() dereferences an unpinned page address, which is 0. To fix this, add a check to verify that all requested memory is pinned. If partial pinning occurs, unpin the memory and return -EFAULT. Kernel Oops: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 UID: 0 PID: 1061 Comm: nvme-passthroug Not tainted 7.0.0-11783-g90957f9314e8-dirty #16 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014 RIP: 0010:bio_integrity_map_user.cold+0x1b0/0x9d6

Severity

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/77c059f41e9395793…
https://git.kernel.org/stable/c/76410790f1491c8e0…
https://git.kernel.org/stable/c/8fa244738641d95ea…
https://git.kernel.org/stable/c/8582792cf23b3d946…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 492c5d455969fc2e829f26ed4c83487b068f0dd7 , < 77c059f41e9395793917d067476f549a911d77d3 (git) Affected: 492c5d455969fc2e829f26ed4c83487b068f0dd7 , < 76410790f1491c8e06a451045ae223a61c652455 (git) Affected: 492c5d455969fc2e829f26ed4c83487b068f0dd7 , < 8fa244738641d95ea4d70e6f9a62778bba42a5b7 (git) Affected: 492c5d455969fc2e829f26ed4c83487b068f0dd7 , < 8582792cf23b3d94674d4d838f7cde9a28d0fcaf (git)
Linux	Linux	Affected: 6.8 Unaffected: 0 , < 6.8 (semver) Unaffected: 6.12.92 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/bio-integrity.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "77c059f41e9395793917d067476f549a911d77d3",
              "status": "affected",
              "version": "492c5d455969fc2e829f26ed4c83487b068f0dd7",
              "versionType": "git"
            },
            {
              "lessThan": "76410790f1491c8e06a451045ae223a61c652455",
              "status": "affected",
              "version": "492c5d455969fc2e829f26ed4c83487b068f0dd7",
              "versionType": "git"
            },
            {
              "lessThan": "8fa244738641d95ea4d70e6f9a62778bba42a5b7",
              "status": "affected",
              "version": "492c5d455969fc2e829f26ed4c83487b068f0dd7",
              "versionType": "git"
            },
            {
              "lessThan": "8582792cf23b3d94674d4d838f7cde9a28d0fcaf",
              "status": "affected",
              "version": "492c5d455969fc2e829f26ed4c83487b068f0dd7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "block/bio-integrity.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.92",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.92",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.34",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.11",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()\n\npin_user_pages_fast() can partially succeed and return the number of\npages that were actually pinned. However, the bio_integrity_map_user()\ndoes not handle this partial pinning. This leads to a general protection\nfault since bvec_from_pages() dereferences an unpinned page address,\nwhich is 0.\n\nTo fix this, add a check to verify that all requested memory is pinned.\nIf partial pinning occurs, unpin the memory and return -EFAULT.\n\nKernel Oops:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 UID: 0 PID: 1061 Comm: nvme-passthroug Not tainted 7.0.0-11783-g90957f9314e8-dirty #16 PREEMPT(lazy)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\nRIP: 0010:bio_integrity_map_user.cold+0x1b0/0x9d6"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T15:39:35.223Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/77c059f41e9395793917d067476f549a911d77d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/76410790f1491c8e06a451045ae223a61c652455"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fa244738641d95ea4d70e6f9a62778bba42a5b7"
        },
        {
          "url": "https://git.kernel.org/stable/c/8582792cf23b3d94674d4d838f7cde9a28d0fcaf"
        }
      ],
      "title": "block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64052",
    "datePublished": "2026-07-19T15:39:35.223Z",
    "dateReserved": "2026-07-19T07:54:57.029Z",
    "dateUpdated": "2026-07-19T15:39:35.223Z",
    "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.

Action not permitted

GHSA-F89W-GG6R-RVWW

CVE-2026-64052 (GCVE-0-2026-64052)

Tags

Sightings

Nomenclature