fkie_nvd - fkie_cve-2022-50240

FKIE_CVE-2022-50240

Vulnerability from fkie_nvd - Published: 2025-09-15 14:15 - Updated: 2025-11-24 17:25

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: android: binder: stop saving a pointer to the VMA Do not record a pointer to a VMA outside of the mmap_lock for later use. This is unsafe and there are a number of failure paths *after* the recorded VMA pointer may be freed during setup. There is no callback to the driver to clear the saved pointer from generic mm code. Furthermore, the VMA pointer may become stale if any number of VMA operations end up freeing the VMA so saving it was fragile to being with. Instead, change the binder_alloc struct to record the start address of the VMA and use vma_lookup() to get the vma when needed. Add lockdep mmap_lock checks on updates to the vma pointer to ensure the lock is held and depend on that lock for synchronization of readers and writers - which was already the case anyways, so the smp_wmb()/smp_rmb() was not necessary. [akpm@linux-foundation.org: fix drivers/android/binder_alloc_selftest.c]

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/015ac18be7de25d17d6e5f1643cb3b60bfbe859e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1ec3f76a436d750fd5023caec5da0494fc2870d2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/27a594bc7a7c8238d239e3cdbcf2edfa3bbe9a1b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/622ef885a89ad04cfb76ee478fb44f051125d1f1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/925e6b6f82c9c80ab3c17acbde8d16f349da7d26	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a43cfc87caaf46710c8027a8c23b8a55f1078f19	Patch

Impacted products

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

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1D67A077-EB45-4ADE-94CD-F9A76F6C319C",
              "versionEndExcluding": "5.4.224",
              "versionStartIncluding": "4.20",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "475D097C-AB5A-4CF5-899F-413077854ABD",
              "versionEndExcluding": "5.10.154",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "51861563-7F40-460F-82CD-2D3FBDAD6618",
              "versionEndExcluding": "5.15.61",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5B42E453-8837-49D0-A5EF-03F818A6DC11",
              "versionEndExcluding": "5.18.18",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A1A2A5A5-4598-4D7E-BA07-4660398D6C8F",
              "versionEndExcluding": "5.19.2",
              "versionStartIncluding": "5.19",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nandroid: binder: stop saving a pointer to the VMA\n\nDo not record a pointer to a VMA outside of the mmap_lock for later use. \nThis is unsafe and there are a number of failure paths *after* the\nrecorded VMA pointer may be freed during setup.  There is no callback to\nthe driver to clear the saved pointer from generic mm code.  Furthermore,\nthe VMA pointer may become stale if any number of VMA operations end up\nfreeing the VMA so saving it was fragile to being with.\n\nInstead, change the binder_alloc struct to record the start address of the\nVMA and use vma_lookup() to get the vma when needed.  Add lockdep\nmmap_lock checks on updates to the vma pointer to ensure the lock is held\nand depend on that lock for synchronization of readers and writers - which\nwas already the case anyways, so the smp_wmb()/smp_rmb() was not\nnecessary.\n\n[akpm@linux-foundation.org: fix drivers/android/binder_alloc_selftest.c]"
    }
  ],
  "id": "CVE-2022-50240",
  "lastModified": "2025-11-24T17:25:46.107",
  "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": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-09-15T14:15:34.250",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/015ac18be7de25d17d6e5f1643cb3b60bfbe859e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1ec3f76a436d750fd5023caec5da0494fc2870d2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/27a594bc7a7c8238d239e3cdbcf2edfa3bbe9a1b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/622ef885a89ad04cfb76ee478fb44f051125d1f1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/925e6b6f82c9c80ab3c17acbde8d16f349da7d26"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a43cfc87caaf46710c8027a8c23b8a55f1078f19"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2022-50240 (GCVE-0-2022-50240)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:01 – Updated: 2025-10-10 15:53

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/27a594bc7a7c8238d…
	https://git.kernel.org/stable/c/015ac18be7de25d17…
	https://git.kernel.org/stable/c/622ef885a89ad04cf…
	https://git.kernel.org/stable/c/925e6b6f82c9c80ab…
	https://git.kernel.org/stable/c/1ec3f76a436d750fd…
	https://git.kernel.org/stable/c/a43cfc87caaf46710…

Impacted products

Vendor

Product

Version

Linux

Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < 27a594bc7a7c8238d239e3cdbcf2edfa3bbe9a1b (git)
Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < 015ac18be7de25d17d6e5f1643cb3b60bfbe859e (git)
Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < 622ef885a89ad04cfb76ee478fb44f051125d1f1 (git)
Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < 925e6b6f82c9c80ab3c17acbde8d16f349da7d26 (git)
Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < 1ec3f76a436d750fd5023caec5da0494fc2870d2 (git)
Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < a43cfc87caaf46710c8027a8c23b8a55f1078f19 (git)

Linux

Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.4.224 , ≤ 5.4.* (semver)
Unaffected: 5.10.154 , ≤ 5.10.* (semver)
Unaffected: 5.15.61 , ≤ 5.15.* (semver)
Unaffected: 5.18.18 , ≤ 5.18.* (semver)
Unaffected: 5.19.2 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/android/binder_alloc.c",
            "drivers/android/binder_alloc.h",
            "drivers/android/binder_alloc_selftest.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "27a594bc7a7c8238d239e3cdbcf2edfa3bbe9a1b",
              "status": "affected",
              "version": "dd2283f2605e3b3e9c61bcae844b34f2afa4813f",
              "versionType": "git"
            },
            {
              "lessThan": "015ac18be7de25d17d6e5f1643cb3b60bfbe859e",
              "status": "affected",
              "version": "dd2283f2605e3b3e9c61bcae844b34f2afa4813f",
              "versionType": "git"
            },
            {
              "lessThan": "622ef885a89ad04cfb76ee478fb44f051125d1f1",
              "status": "affected",
              "version": "dd2283f2605e3b3e9c61bcae844b34f2afa4813f",
              "versionType": "git"
            },
            {
              "lessThan": "925e6b6f82c9c80ab3c17acbde8d16f349da7d26",
              "status": "affected",
              "version": "dd2283f2605e3b3e9c61bcae844b34f2afa4813f",
              "versionType": "git"
            },
            {
              "lessThan": "1ec3f76a436d750fd5023caec5da0494fc2870d2",
              "status": "affected",
              "version": "dd2283f2605e3b3e9c61bcae844b34f2afa4813f",
              "versionType": "git"
            },
            {
              "lessThan": "a43cfc87caaf46710c8027a8c23b8a55f1078f19",
              "status": "affected",
              "version": "dd2283f2605e3b3e9c61bcae844b34f2afa4813f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/android/binder_alloc.c",
            "drivers/android/binder_alloc.h",
            "drivers/android/binder_alloc_selftest.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.61",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.224",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.154",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.61",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.18",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.2",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nandroid: binder: stop saving a pointer to the VMA\n\nDo not record a pointer to a VMA outside of the mmap_lock for later use. \nThis is unsafe and there are a number of failure paths *after* the\nrecorded VMA pointer may be freed during setup.  There is no callback to\nthe driver to clear the saved pointer from generic mm code.  Furthermore,\nthe VMA pointer may become stale if any number of VMA operations end up\nfreeing the VMA so saving it was fragile to being with.\n\nInstead, change the binder_alloc struct to record the start address of the\nVMA and use vma_lookup() to get the vma when needed.  Add lockdep\nmmap_lock checks on updates to the vma pointer to ensure the lock is held\nand depend on that lock for synchronization of readers and writers - which\nwas already the case anyways, so the smp_wmb()/smp_rmb() was not\nnecessary.\n\n[akpm@linux-foundation.org: fix drivers/android/binder_alloc_selftest.c]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-10T15:53:38.644Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/27a594bc7a7c8238d239e3cdbcf2edfa3bbe9a1b"
        },
        {
          "url": "https://git.kernel.org/stable/c/015ac18be7de25d17d6e5f1643cb3b60bfbe859e"
        },
        {
          "url": "https://git.kernel.org/stable/c/622ef885a89ad04cfb76ee478fb44f051125d1f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/925e6b6f82c9c80ab3c17acbde8d16f349da7d26"
        },
        {
          "url": "https://git.kernel.org/stable/c/1ec3f76a436d750fd5023caec5da0494fc2870d2"
        },
        {
          "url": "https://git.kernel.org/stable/c/a43cfc87caaf46710c8027a8c23b8a55f1078f19"
        }
      ],
      "title": "android: binder: stop saving a pointer to the VMA",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50240",
    "datePublished": "2025-09-15T14:01:45.724Z",
    "dateReserved": "2025-09-15T13:58:00.971Z",
    "dateUpdated": "2025-10-10T15:53:38.644Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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

FKIE_CVE-2022-50240

CVE-2022-50240 (GCVE-0-2022-50240)

Tags

Sightings

Nomenclature