Vulnerability-Lookup

FKIE_CVE-2022-50329

Vulnerability from fkie_nvd - Published: 2025-09-15 15:15 - Updated: 2026-08-04 10:18

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: block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq Commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'") will access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq() can free bfqq first, and then call bic_set_bfqq(), which will cause uaf. Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1425f1bb5df5239021fd09ebc2a5e8070e705d36	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	5.15.86
linux	linux_kernel	6.0.16
linux	linux_kernel	6.1.2
linux	linux_kernel	6.2

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/bfq-iosched.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a",
              "versionType": "git"
            },
            {
              "lessThan": "7949b0df3dd9f4817ed4a4e989fa9ee81df6205f",
              "status": "affected",
              "version": "094f3d9314d67691cb21ba091c1b528f6e3c4893",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "b22fd72bfebda3956efc4431b60ddfc0a51e03e0",
              "versionType": "git"
            },
            {
              "lessThan": "1ed959fef5b1c6f1a7a3fbea543698c30ebd6678",
              "status": "affected",
              "version": "761564d93c8265f65543acf0a576b32d66bfa26a",
              "versionType": "git"
            },
            {
              "lessThan": "246cf66e300b76099b5dbd3fdd39e9a5dbc53f02",
              "status": "affected",
              "version": "64dc8c732f5c2b406cc752e6aaa1bd5471159cab",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/bfq-iosched.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5.15.87",
              "status": "affected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThan": "6.0.17",
              "status": "affected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.3",
              "status": "affected",
              "version": "6.1.2",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15.86:*:*:*:*:*:*:*",
              "matchCriteriaId": "565709DF-CD9E-45F6-8BAB-1CDEBC2D14F9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.0.16:*:*:*:*:*:*:*",
              "matchCriteriaId": "0F12ACFA-7194-43FD-B79A-93AEA2668E6F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1.2:*:*:*:*:*:*:*",
              "matchCriteriaId": "4A1A2CF8-ACB8-4475-B530-92ECBB0ADBF0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "FF501633-2F44-4913-A8EE-B021929F49F6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq\n\nCommit 64dc8c732f5c (\"block, bfq: fix possible uaf for \u0027bfqq-\u003ebic\u0027\")\nwill access \u0027bic-\u003ebfqq\u0027 in bic_set_bfqq(), however, bfq_exit_icq_bfqq()\ncan free bfqq first, and then call bic_set_bfqq(), which will cause uaf.\n\nFix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq()."
    }
  ],
  "id": "CVE-2022-50329",
  "lastModified": "2026-08-04T10:18:11.217",
  "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"
      }
    ]
  },
  "published": "2025-09-15T15:15:45.067",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1425f1bb5df5239021fd09ebc2a5e8070e705d36"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2022-50329 (GCVE-0-2022-50329)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:49 – Updated: 2026-08-05 08:58

Title

block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq

Summary

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/1425f1bb5df523902…
https://git.kernel.org/stable/c/7949b0df3dd9f4817…
https://git.kernel.org/stable/c/cfe5b38c37720313e…
https://git.kernel.org/stable/c/1ed959fef5b1c6f1a…
https://git.kernel.org/stable/c/246cf66e300b76099…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a , < 1425f1bb5df5239021fd09ebc2a5e8070e705d36 (git) Affected: 094f3d9314d67691cb21ba091c1b528f6e3c4893 , < 7949b0df3dd9f4817ed4a4e989fa9ee81df6205f (git) Affected: b22fd72bfebda3956efc4431b60ddfc0a51e03e0 , < cfe5b38c37720313eff0dec5517442c7ab3c9a20 (git) Affected: 761564d93c8265f65543acf0a576b32d66bfa26a , < 1ed959fef5b1c6f1a7a3fbea543698c30ebd6678 (git) Affected: 64dc8c732f5c2b406cc752e6aaa1bd5471159cab , < 246cf66e300b76099b5dbd3fdd39e9a5dbc53f02 (git)
Linux	Linux	Affected: 5.15.86 , < 5.15.87 (semver) Affected: 6.0.16 , < 6.0.17 (semver) Affected: 6.1.2 , < 6.1.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/bfq-iosched.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1425f1bb5df5239021fd09ebc2a5e8070e705d36",
              "status": "affected",
              "version": "5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a",
              "versionType": "git"
            },
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              "versionType": "git"
            },
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              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "246cf66e300b76099b5dbd3fdd39e9a5dbc53f02",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "5.15.86",
              "versionType": "semver"
            },
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              "lessThan": "6.0.17",
              "status": "affected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.3",
              "status": "affected",
              "version": "6.1.2",
              "versionType": "semver"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.15.86",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.17",
                  "versionStartIncluding": "6.0.16",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "negate": false,
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          "lang": "en",
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        }
      ],
      "metrics": [
        {
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            "baseScore": 7.8,
            "baseSeverity": "HIGH",
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            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path runs in bfq_exit_icq during exit_io_context after local block I/O on a BFQ-managed device; it is reached via process exit/syscalls, not network or physical input.\nAC:L - An unprivileged attacker fully controls triggering by performing I/O then exiting so the process ref drops and bfq_put_queue frees bfqq before bic_set_bfqq; BFQ is commonly enabled (e.g. Android/desktops), so success does not depend on conditions outside attacker control.\nPR:L - Any unprivileged local user can open/write files on a BFQ-backed filesystem and exit; no capabilities or root are required along the exit_io_context \u2192 bfq_exit_icq path.\nUI:N - Exploitation needs only the attacker\u0027s own I/O and process exit; no victim action is required.\nS:U - This is a standard in-kernel heap UAF enabling privilege escalation within the same kernel security authority, not a VM/IOMMU/sandbox boundary cross.\nC:H - Use-after-free of struct bfq_queue lets an attacker reclaim and control the freed object, enabling arbitrary kernel memory disclosure primitives.\nI:H - bic_set_bfqq writes old_bfqq-\u003ebic on the freed object; with heap spray this yields a write primitive suitable for control-flow hijacking or arbitrary kernel modification.\nA:H - The UAF can oops/panic the kernel on access to freed bfqq memory even without full exploitation, so availability impact is high."
            }
          ]
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:58:13.157Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02"
        }
      ],
      "title": "block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50329",
    "datePublished": "2025-09-15T14:49:32.123Z",
    "dateReserved": "2025-09-15T14:18:36.815Z",
    "dateUpdated": "2026-08-05T08:58:13.157Z",
    "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.

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FKIE_CVE-2022-50329

CVE-2022-50329 (GCVE-0-2022-50329)

Tags

Sightings

Nomenclature

Related by attack behaviour