CVE-2022-49223 (GCVE-0-2022-49223)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:55 – Updated: 2026-05-11 18:55
VLAI
Title
cxl/port: Hold port reference until decoder release
Summary
In the Linux kernel, the following vulnerability has been resolved: cxl/port: Hold port reference until decoder release KASAN + DEBUG_KOBJECT_RELEASE reports a potential use-after-free in cxl_decoder_release() where it goes to reference its parent, a cxl_port, to free its id back to port->decoder_ida. BUG: KASAN: use-after-free in to_cxl_port+0x18/0x90 [cxl_core] Read of size 8 at addr ffff888119270908 by task kworker/35:2/379 CPU: 35 PID: 379 Comm: kworker/35:2 Tainted: G OE 5.17.0-rc2+ #198 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 Workqueue: events kobject_delayed_cleanup Call Trace: <TASK> dump_stack_lvl+0x59/0x73 print_address_description.constprop.0+0x1f/0x150 ? to_cxl_port+0x18/0x90 [cxl_core] kasan_report.cold+0x83/0xdf ? to_cxl_port+0x18/0x90 [cxl_core] to_cxl_port+0x18/0x90 [cxl_core] cxl_decoder_release+0x2a/0x60 [cxl_core] device_release+0x5f/0x100 kobject_cleanup+0x80/0x1c0 The device core only guarantees parent lifetime until all children are unregistered. If a child needs a parent to complete its ->release() callback that child needs to hold a reference to extend the lifetime of the parent.
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: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 18:17 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 40ba17afdfabb01688c61565dbe02a916241bc05 , < 518bb96367123062b48b0a9842f2864249b565f6 (git)
Affected: 40ba17afdfabb01688c61565dbe02a916241bc05 , < b0022ca445d5fc4d0c89d15dcd0f855977b22c1d (git)
Affected: 40ba17afdfabb01688c61565dbe02a916241bc05 , < 49f2dab77a5e1354f5da6ccdc9346a8212697be2 (git)
Affected: 40ba17afdfabb01688c61565dbe02a916241bc05 , < 74be98774dfbc5b8b795db726bd772e735d2edd4 (git)
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Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.54 , ≤ 5.15.* (semver)
Unaffected: 5.16.19 , ≤ 5.16.* (semver)
Unaffected: 5.17.2 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                  "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"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-49223",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-02-27T18:17:03.093183Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-416",
                    "description": "CWE-416 Use After Free",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-02-27T18:17:04.385Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/cxl/core/port.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "518bb96367123062b48b0a9842f2864249b565f6",
                  "status": "affected",
                  "version": "40ba17afdfabb01688c61565dbe02a916241bc05",
                  "versionType": "git"
                },
                {
                  "lessThan": "b0022ca445d5fc4d0c89d15dcd0f855977b22c1d",
                  "status": "affected",
                  "version": "40ba17afdfabb01688c61565dbe02a916241bc05",
                  "versionType": "git"
                },
                {
                  "lessThan": "49f2dab77a5e1354f5da6ccdc9346a8212697be2",
                  "status": "affected",
                  "version": "40ba17afdfabb01688c61565dbe02a916241bc05",
                  "versionType": "git"
                },
                {
                  "lessThan": "74be98774dfbc5b8b795db726bd772e735d2edd4",
                  "status": "affected",
                  "version": "40ba17afdfabb01688c61565dbe02a916241bc05",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/cxl/core/port.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.14"
                },
                {
                  "lessThan": "5.14",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.54",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.16.*",
                  "status": "unaffected",
                  "version": "5.16.19",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.17.*",
                  "status": "unaffected",
                  "version": "5.17.2",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.18",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.54",
                      "versionStartIncluding": "5.14",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.16.19",
                      "versionStartIncluding": "5.14",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.17.2",
                      "versionStartIncluding": "5.14",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.18",
                      "versionStartIncluding": "5.14",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/port: Hold port reference until decoder release\n\nKASAN + DEBUG_KOBJECT_RELEASE reports a potential use-after-free in\ncxl_decoder_release() where it goes to reference its parent, a cxl_port,\nto free its id back to port-\u003edecoder_ida.\n\n BUG: KASAN: use-after-free in to_cxl_port+0x18/0x90 [cxl_core]\n Read of size 8 at addr ffff888119270908 by task kworker/35:2/379\n\n CPU: 35 PID: 379 Comm: kworker/35:2 Tainted: G           OE     5.17.0-rc2+ #198\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n Workqueue: events kobject_delayed_cleanup\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x59/0x73\n  print_address_description.constprop.0+0x1f/0x150\n  ? to_cxl_port+0x18/0x90 [cxl_core]\n  kasan_report.cold+0x83/0xdf\n  ? to_cxl_port+0x18/0x90 [cxl_core]\n  to_cxl_port+0x18/0x90 [cxl_core]\n  cxl_decoder_release+0x2a/0x60 [cxl_core]\n  device_release+0x5f/0x100\n  kobject_cleanup+0x80/0x1c0\n\nThe device core only guarantees parent lifetime until all children are\nunregistered. If a child needs a parent to complete its -\u003erelease()\ncallback that child needs to hold a reference to extend the lifetime of\nthe parent."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T18:55:31.833Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/518bb96367123062b48b0a9842f2864249b565f6"
            },
            {
              "url": "https://git.kernel.org/stable/c/b0022ca445d5fc4d0c89d15dcd0f855977b22c1d"
            },
            {
              "url": "https://git.kernel.org/stable/c/49f2dab77a5e1354f5da6ccdc9346a8212697be2"
            },
            {
              "url": "https://git.kernel.org/stable/c/74be98774dfbc5b8b795db726bd772e735d2edd4"
            }
          ],
          "title": "cxl/port: Hold port reference until decoder release",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49223",
        "datePublished": "2025-02-26T01:55:54.274Z",
        "dateReserved": "2025-02-26T01:49:39.293Z",
        "dateUpdated": "2026-05-11T18:55:31.833Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Vulnerability timeline

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