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CVE-2022-50422 (GCVE-0-2022-50422)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:41 – Updated: 2026-05-11 19:19
VLAI
Title
scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: libsas: Fix use-after-free bug in smp_execute_task_sg() When executing SMP task failed, the smp_execute_task_sg() calls del_timer() to delete "slow_task->timer". However, if the timer handler sas_task_internal_timedout() is running, the del_timer() in smp_execute_task_sg() will not stop it and a UAF will happen. The process is shown below: (thread 1) | (thread 2) smp_execute_task_sg() | sas_task_internal_timedout() ... | del_timer() | ... | ... sas_free_task(task) | kfree(task->slow_task) //FREE| | task->slow_task->... //USE Fix by calling del_timer_sync() in smp_execute_task_sg(), which makes sure the timer handler have finished before the "task->slow_task" is deallocated.
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 2026-01-14 17:39 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < 117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe (git)
Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < a9e5176ead6de64f572ad5c87a72825d9d3c82ae (git)
Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < e45a1516d2933703a4823d9db71e17c3abeba24f (git)
Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < f7a785177611ffc97d645fcbc196e6de6ad2421d (git)
Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < 2e12ce270f0d926085c1209cc90397e307deef97 (git)
Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < 46ba53c30666717cb06c2b3c5d896301cd00d0c0 (git)
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Linux Linux Affected: 2.6.19
Unaffected: 0 , < 2.6.19 (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)
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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"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:49:57+00:00",
      "cve": "CVE-2022-50422",
      "id": "CVE-2022-50422",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50422.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "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-2022-50422",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-01-14T17:39:50.991299Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-416",
                    "description": "CWE-416 Use After Free",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-01-14T17:39:46.658Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/scsi/libsas/sas_expander.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe",
                  "status": "affected",
                  "version": "2908d778ab3e244900c310974e1fc1c69066e450",
                  "versionType": "git"
                },
                {
                  "lessThan": "a9e5176ead6de64f572ad5c87a72825d9d3c82ae",
                  "status": "affected",
                  "version": "2908d778ab3e244900c310974e1fc1c69066e450",
                  "versionType": "git"
                },
                {
                  "lessThan": "e45a1516d2933703a4823d9db71e17c3abeba24f",
                  "status": "affected",
                  "version": "2908d778ab3e244900c310974e1fc1c69066e450",
                  "versionType": "git"
                },
                {
                  "lessThan": "f7a785177611ffc97d645fcbc196e6de6ad2421d",
                  "status": "affected",
                  "version": "2908d778ab3e244900c310974e1fc1c69066e450",
                  "versionType": "git"
                },
                {
                  "lessThan": "2e12ce270f0d926085c1209cc90397e307deef97",
                  "status": "affected",
                  "version": "2908d778ab3e244900c310974e1fc1c69066e450",
                  "versionType": "git"
                },
                {
                  "lessThan": "46ba53c30666717cb06c2b3c5d896301cd00d0c0",
                  "status": "affected",
                  "version": "2908d778ab3e244900c310974e1fc1c69066e450",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/scsi/libsas/sas_expander.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "2.6.19"
                },
                {
                  "lessThan": "2.6.19",
                  "status": "unaffected",
                  "version": "0",
                  "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": "5.4.220",
                      "versionStartIncluding": "2.6.19",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.150",
                      "versionStartIncluding": "2.6.19",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.75",
                      "versionStartIncluding": "2.6.19",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.19.17",
                      "versionStartIncluding": "2.6.19",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.0.3",
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                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1",
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                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libsas: Fix use-after-free bug in smp_execute_task_sg()\n\nWhen executing SMP task failed, the smp_execute_task_sg() calls del_timer()\nto delete \"slow_task-\u003etimer\". However, if the timer handler\nsas_task_internal_timedout() is running, the del_timer() in\nsmp_execute_task_sg() will not stop it and a UAF will happen. The process\nis shown below:\n\n      (thread 1)               |        (thread 2)\nsmp_execute_task_sg()          | sas_task_internal_timedout()\n ...                           |\n del_timer()                   |\n ...                           |  ...\n sas_free_task(task)           |\n  kfree(task-\u003eslow_task) //FREE|\n                               |  task-\u003eslow_task-\u003e... //USE\n\nFix by calling del_timer_sync() in smp_execute_task_sg(), which makes sure\nthe timer handler have finished before the \"task-\u003eslow_task\" is\ndeallocated."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T19:19:11.176Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe"
            },
            {
              "url": "https://git.kernel.org/stable/c/a9e5176ead6de64f572ad5c87a72825d9d3c82ae"
            },
            {
              "url": "https://git.kernel.org/stable/c/e45a1516d2933703a4823d9db71e17c3abeba24f"
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            },
            {
              "url": "https://git.kernel.org/stable/c/2e12ce270f0d926085c1209cc90397e307deef97"
            },
            {
              "url": "https://git.kernel.org/stable/c/46ba53c30666717cb06c2b3c5d896301cd00d0c0"
            }
          ],
          "title": "scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()",
          "x_generator": {
            "engine": "bippy-1.2.0"
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        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-50422",
        "datePublished": "2025-10-01T11:41:55.147Z",
        "dateReserved": "2025-09-17T14:53:07.004Z",
        "dateUpdated": "2026-05-11T19:19:11.176Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • 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.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.