Vulnerability-Lookup

FKIE_CVE-2022-50386

Vulnerability from fkie_nvd - Published: 2025-09-18 14:15 - Updated: 2026-08-04 10:18

Severity

8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.0 (High) - CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.0 (High) - CVSS:3.1/AV:A/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: Bluetooth: L2CAP: Fix user-after-free This uses l2cap_chan_hold_unless_zero() after calling __l2cap_get_chan_blah() to prevent the following trace: Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref *kref) Bluetooth: chan 0000000023c4974d Bluetooth: parent 00000000ae861c08 ================================================================== BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:191 [inline] BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:671 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400 kernel/locking/mutex.c:729 Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0c108cf3ad386e0084277093b55a351c49e0be27	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/11e40d6c0823f699d8ad501e48d1c3ae4be386cd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/15fc21695eb606bdc5d483b92118ee42610a952d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6ffde6e03085874ae22263ff4cef4869f797e84f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/843fc4e386dd84b806a7f07fb062d8c3a44e5364	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d1e894f950ad48897d1a7cb05909ea29d8c3810e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d91fc2836562f299f34e361e089e9fe154da4f73	Patch

Impacted products

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

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/l2cap_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "11e40d6c0823f699d8ad501e48d1c3ae4be386cd",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "843fc4e386dd84b806a7f07fb062d8c3a44e5364",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "d91fc2836562f299f34e361e089e9fe154da4f73",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "0c108cf3ad386e0084277093b55a351c49e0be27",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "d1e894f950ad48897d1a7cb05909ea29d8c3810e",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "6ffde6e03085874ae22263ff4cef4869f797e84f",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/l2cap_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.4"
            },
            {
              "lessThan": "3.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.331",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.296",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.262",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.220",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.150",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F5B7C986-E6CA-41ED-A833-EA73FCF421D4",
              "versionEndExcluding": "4.9.331",
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            {
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              "versionEndExcluding": "5.4.220",
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C495821C-2A71-4F09-BED8-6A6EB4C9BA27",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6D945F46-F32F-4C09-8400-C3477E22A9FB",
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "19B4C3A4-E5C3-41DC-BB14-BE72858E7D35",
              "versionEndExcluding": "5.19.17",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5BCD8201-B847-4442-B894-70D430128DEF",
              "versionEndExcluding": "6.0.3",
              "versionStartIncluding": "6.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix user-after-free\n\nThis uses l2cap_chan_hold_unless_zero() after calling\n__l2cap_get_chan_blah() to prevent the following trace:\n\nBluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref\n*kref)\nBluetooth: chan 0000000023c4974d\nBluetooth: parent 00000000ae861c08\n==================================================================\nBUG: KASAN: use-after-free in __mutex_waiter_is_first\nkernel/locking/mutex.c:191 [inline]\nBUG: KASAN: use-after-free in __mutex_lock_common\nkernel/locking/mutex.c:671 [inline]\nBUG: KASAN: use-after-free in __mutex_lock+0x278/0x400\nkernel/locking/mutex.c:729\nRead of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389"
    }
  ],
  "id": "CVE-2022-50386",
  "lastModified": "2026-08-04T10:18:13.947",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-50386",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-14T18:49:08.856293Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-09-18T14:15:37.480",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0c108cf3ad386e0084277093b55a351c49e0be27"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/11e40d6c0823f699d8ad501e48d1c3ae4be386cd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/15fc21695eb606bdc5d483b92118ee42610a952d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6ffde6e03085874ae22263ff4cef4869f797e84f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/843fc4e386dd84b806a7f07fb062d8c3a44e5364"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/d1e894f950ad48897d1a7cb05909ea29d8c3810e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d91fc2836562f299f34e361e089e9fe154da4f73"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2022-50386 (GCVE-0-2022-50386)

Vulnerability from cvelistv5 – Published: 2025-09-18 13:33 – Updated: 2026-08-05 08:58

Title

Bluetooth: L2CAP: Fix user-after-free

Summary

Severity

8.8 (High)


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

8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-14 18:49 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux CNA under the mitre root

CNA scorecard D 54/100 over 6633 records in the last 180 days details

References

9 references

URL	Tags
https://git.kernel.org/stable/c/11e40d6c0823f699d…
https://git.kernel.org/stable/c/843fc4e386dd84b80…
https://git.kernel.org/stable/c/d91fc2836562f299f…
https://git.kernel.org/stable/c/7d6f9cb24d2b2f6b6…
https://git.kernel.org/stable/c/0c108cf3ad386e008…
https://git.kernel.org/stable/c/d1e894f950ad48897…
https://git.kernel.org/stable/c/6ffde6e03085874ae…
https://git.kernel.org/stable/c/15fc21695eb606bdc…
https://git.kernel.org/stable/c/35fcbc4243aad7e7d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3df91ea20e744344100b10ae69a17211fcf5b207 , < 11e40d6c0823f699d8ad501e48d1c3ae4be386cd (git) Affected: 3df91ea20e744344100b10ae69a17211fcf5b207 , < 843fc4e386dd84b806a7f07fb062d8c3a44e5364 (git) Affected: 3df91ea20e744344100b10ae69a17211fcf5b207 , < d91fc2836562f299f34e361e089e9fe154da4f73 (git) Affected: 3df91ea20e744344100b10ae69a17211fcf5b207 , < 7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45 (git) Affected: 3df91ea20e744344100b10ae69a17211fcf5b207 , < 0c108cf3ad386e0084277093b55a351c49e0be27 (git) Affected: 3df91ea20e744344100b10ae69a17211fcf5b207 , < d1e894f950ad48897d1a7cb05909ea29d8c3810e (git) Affected: 3df91ea20e744344100b10ae69a17211fcf5b207 , < 6ffde6e03085874ae22263ff4cef4869f797e84f (git) Affected: 3df91ea20e744344100b10ae69a17211fcf5b207 , < 15fc21695eb606bdc5d483b92118ee42610a952d (git) Affected: 3df91ea20e744344100b10ae69a17211fcf5b207 , < 35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f (git)
Linux	Linux	Affected: 3.4 Unaffected: 0 , < 3.4 (semver) Unaffected: 4.9.331 , ≤ 4.9.* (semver) Unaffected: 4.14.296 , ≤ 4.14.* (semver) Unaffected: 4.19.262 , ≤ 4.19.* (semver) Unaffected: 5.4.220 , ≤ 5.4.* (semver) Unaffected: 5.10.150 , ≤ 5.10.* (semver) Unaffected: 5.15.75 , ≤ 5.15.* (semver) Unaffected: 5.19.17 , ≤ 5.19.* (semver) Unaffected: 6.0.3 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "ADJACENT_NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-50386",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T18:49:08.856293Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T18:53:04.692Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/l2cap_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "11e40d6c0823f699d8ad501e48d1c3ae4be386cd",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "843fc4e386dd84b806a7f07fb062d8c3a44e5364",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "d91fc2836562f299f34e361e089e9fe154da4f73",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "0c108cf3ad386e0084277093b55a351c49e0be27",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "d1e894f950ad48897d1a7cb05909ea29d8c3810e",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "6ffde6e03085874ae22263ff4cef4869f797e84f",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "15fc21695eb606bdc5d483b92118ee42610a952d",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            },
            {
              "lessThan": "35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f",
              "status": "affected",
              "version": "3df91ea20e744344100b10ae69a17211fcf5b207",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/l2cap_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.4"
            },
            {
              "lessThan": "3.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.331",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.296",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.262",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.220",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.150",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.331",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.296",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.262",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.220",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.150",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.75",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.17",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.3",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "3.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix user-after-free\n\nThis uses l2cap_chan_hold_unless_zero() after calling\n__l2cap_get_chan_blah() to prevent the following trace:\n\nBluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref\n*kref)\nBluetooth: chan 0000000023c4974d\nBluetooth: parent 00000000ae861c08\n==================================================================\nBUG: KASAN: use-after-free in __mutex_waiter_is_first\nkernel/locking/mutex.c:191 [inline]\nBUG: KASAN: use-after-free in __mutex_lock_common\nkernel/locking/mutex.c:671 [inline]\nBUG: KASAN: use-after-free in __mutex_lock+0x278/0x400\nkernel/locking/mutex.c:729\nRead of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The bug is in BR/EDR L2CAP signaling (`l2cap_connect_create_rsp`) reached via ACL frames from a Bluetooth peer (`l2cap_recv_acldata` \u2192 `l2cap_sig_channel`), so exploitation requires adjacent-network Bluetooth proximity.\nAC:L - A remote peer can send L2CAP_CONN_RSP/CREATE_CHAN_RSP while concurrently forcing channel teardown (disconnect/link drop), controlling both sides of the UAF race, so success does not depend on conditions outside attacker influence.\nPR:N - L2CAP connect responses are processed on the signaling CID for established ACL links at default BT_SECURITY_LOW/SDP without authentication or local privileges on the victim host.\nUI:N - No additional victim action is required beyond ordinary Bluetooth connection activity; a malicious adjacent device can trigger the path during normal connect/reconnect flows.\nS:U - This is a standard in-kernel L2CAP channel UAF that enables privilege impact only within the same kernel security authority, not a boundary crossing such as VM/IOMMU escape.\nC:H - Use-after-free of the `l2cap_chan` object allows reclaim and attacker-controlled contents, which can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same UAF enables heap spray and corruption of the freed channel/mutex-related state, providing a path to arbitrary write and control-flow hijacking in the kernel.\nA:H - The KASAN report shows a kernel UAF during `l2cap_chan_lock`, which can oops/panic the kernel even when not fully exploited for code execution."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:58:30.414Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/11e40d6c0823f699d8ad501e48d1c3ae4be386cd"
        },
        {
          "url": "https://git.kernel.org/stable/c/843fc4e386dd84b806a7f07fb062d8c3a44e5364"
        },
        {
          "url": "https://git.kernel.org/stable/c/d91fc2836562f299f34e361e089e9fe154da4f73"
        },
        {
          "url": "https://git.kernel.org/stable/c/7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c108cf3ad386e0084277093b55a351c49e0be27"
        },
        {
          "url": "https://git.kernel.org/stable/c/d1e894f950ad48897d1a7cb05909ea29d8c3810e"
        },
        {
          "url": "https://git.kernel.org/stable/c/6ffde6e03085874ae22263ff4cef4869f797e84f"
        },
        {
          "url": "https://git.kernel.org/stable/c/15fc21695eb606bdc5d483b92118ee42610a952d"
        },
        {
          "url": "https://git.kernel.org/stable/c/35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f"
        }
      ],
      "title": "Bluetooth: L2CAP: Fix user-after-free",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50386",
    "datePublished": "2025-09-18T13:33:07.191Z",
    "dateReserved": "2025-09-17T14:53:06.997Z",
    "dateUpdated": "2026-08-05T08:58:30.414Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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-2022-50386

CVE-2022-50386 (GCVE-0-2022-50386)

Tags

Sightings

Nomenclature

Related by attack behaviour