Vulnerability-Lookup

FKIE_CVE-2022-48874

Vulnerability from fkie_nvd - Published: 2024-08-21 07:15 - Updated: 2026-08-04 10:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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: misc: fastrpc: Fix use-after-free and race in fastrpc_map_find Currently, there is a race window between the point when the mutex is unlocked in fastrpc_map_lookup and the reference count increasing (fastrpc_map_get) in fastrpc_map_find, which can also lead to use-after-free. So lets merge fastrpc_map_find into fastrpc_map_lookup which allows us to both protect the maps list by also taking the &fl->lock spinlock and the reference count, since the spinlock will be released only after. Add take_ref argument to make this suitable for all callers.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9446fa1683a7e3937d9970248ced427c1983a1c5	Patch
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a50c5c25b6e7d2824698c0e6385f882a18f4a498	Patch

Impacted products

	Vendor	Product	Version
	linux	linux_kernel	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/fastrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a50c5c25b6e7d2824698c0e6385f882a18f4a498",
              "status": "affected",
              "version": "8f6c1d8c4f0cc316b0456788fff8373554d1d99d",
              "versionType": "git"
            },
            {
              "lessThan": "9446fa1683a7e3937d9970248ced427c1983a1c5",
              "status": "affected",
              "version": "8f6c1d8c4f0cc316b0456788fff8373554d1d99d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/fastrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "322A7D37-5D31-4288-87E6-2947F4E61BE1",
              "versionEndExcluding": "6.1.8",
              "versionStartIncluding": "5.18",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: Fix use-after-free and race in fastrpc_map_find\n\nCurrently, there is a race window between the point when the mutex is\nunlocked in fastrpc_map_lookup and the reference count increasing\n(fastrpc_map_get) in fastrpc_map_find, which can also lead to\nuse-after-free.\n\nSo lets merge fastrpc_map_find into fastrpc_map_lookup which allows us\nto both protect the maps list by also taking the \u0026fl-\u003elock spinlock and\nthe reference count, since the spinlock will be released only after.\nAdd take_ref argument to make this suitable for all callers."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: misc: fastrpc: corrige use-after-free y ejecuci\u00f3n en fastrpc_map_find Actualmente, hay una ventana de ejecuci\u00f3n entre el punto en el que se desbloquea el mutex en fastrpc_map_lookup y el recuento de referencias aumenta (fastrpc_map_get ) en fastrpc_map_find, lo que tambi\u00e9n puede generar use-after-free. Entonces, fusionemos fastrpc_map_find con fastrpc_map_lookup, lo que nos permite proteger la lista de mapas tomando tambi\u00e9n el \u0026amp;fl-\u0026gt;lock spinlock y el recuento de referencias, ya que el spinlock se liberar\u00e1 solo despu\u00e9s. Agregue el argumento take_ref para que sea adecuado para todas las personas que llaman."
    }
  ],
  "id": "CVE-2022-48874",
  "lastModified": "2026-08-04T10:17:25.073",
  "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": 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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-48874",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T16:05:19.392844Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-08-21T07:15:04.383",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/9446fa1683a7e3937d9970248ced427c1983a1c5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a50c5c25b6e7d2824698c0e6385f882a18f4a498"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2022-48874 (GCVE-0-2022-48874)

Vulnerability from cvelistv5 – Published: 2024-08-21 06:10 – Updated: 2026-08-05 08:52

Title

misc: fastrpc: Fix use-after-free and race in fastrpc_map_find

Summary

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 16:05 UTC

Assigner

Linux mitre root Scorecard

References

2 references

URL	Tags
https://git.kernel.org/stable/c/a50c5c25b6e7d2824…
https://git.kernel.org/stable/c/9446fa1683a7e3937…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8f6c1d8c4f0cc316b0456788fff8373554d1d99d , < a50c5c25b6e7d2824698c0e6385f882a18f4a498 (git) Affected: 8f6c1d8c4f0cc316b0456788fff8373554d1d99d , < 9446fa1683a7e3937d9970248ced427c1983a1c5 (git)
Linux	Linux	Affected: 5.18 Unaffected: 0 , < 5.18 (semver) Unaffected: 6.1.8 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-48874",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:05:19.392844Z",
                "version": "2.0.3"
              },
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            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-12T17:32:53.688Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/fastrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a50c5c25b6e7d2824698c0e6385f882a18f4a498",
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              "version": "8f6c1d8c4f0cc316b0456788fff8373554d1d99d",
              "versionType": "git"
            },
            {
              "lessThan": "9446fa1683a7e3937d9970248ced427c1983a1c5",
              "status": "affected",
              "version": "8f6c1d8c4f0cc316b0456788fff8373554d1d99d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/fastrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
            {
              "status": "affected",
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            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
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        }
      ],
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          "lang": "en",
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          "scenarios": [
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              "lang": "en",
              "value": "AV:L - The vulnerability is reached only through local ioctls on /dev/fastrpc-* misc devices (FASTRPC_IOCTL_INVOKE / MEM_MAP / MEM_UNMAP) via fastrpc_device_ioctl \u2192 fastrpc_map_create \u2192 fastrpc_map_find; it is not reachable from network packet processing.\nAC:L - The attacker controls both sides of the race by issuing concurrent ioctls from multiple threads on the same fastrpc fd (e.g. map_find via invoke/mem_map while another thread drops the last map ref via mem_unmap or put_args), so success does not depend on conditions outside attacker control.\nPR:L - fastrpc_device_open performs no capability check, and on typical Qualcomm/Android deployments unprivileged/untrusted contexts can obtain access to the non-secure fastrpc node (directly or via HAL FD passing), so real root/init-namespace privileges are not required.\nUI:N - Exploitation requires only the attacker\u2019s own open/ioctl calls on the fastrpc device; no separate victim action is needed.\nS:U - This is a kernel heap UAF enabling privilege escalation within the same OS security authority; it does not cross a VM, IOMMU, or other security-authority boundary.\nC:H - Use-after-free of struct fastrpc_map lets an attacker reclaim and control the freed object, enabling arbitrary kernel memory disclosure.\nI:H - The same UAF is exploitable for heap spraying and arbitrary write / control-flow hijacking in the kernel, not merely a limited corruption.\nA:H - Use-after-free of the map object can cause kernel oops/panic (and does so even when not fully exploited for code execution)."
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    "state": "PUBLISHED"
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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.

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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FKIE_CVE-2022-48874

CVE-2022-48874 (GCVE-0-2022-48874)

Tags

Sightings

Nomenclature

Related by attack behaviour