CVE-2022-50422 (GCVE-0-2022-50422)
Vulnerability from cvelistv5
Published
2025-10-01 11:41
Modified
2025-10-01 11:41
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2908d778ab3e244900c310974e1fc1c69066e450
Version: 2908d778ab3e244900c310974e1fc1c69066e450
Version: 2908d778ab3e244900c310974e1fc1c69066e450
Version: 2908d778ab3e244900c310974e1fc1c69066e450
Version: 2908d778ab3e244900c310974e1fc1c69066e450
Version: 2908d778ab3e244900c310974e1fc1c69066e450
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "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",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "2.6.19",
                  "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": "2025-10-01T11:41:55.147Z",
        "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"
        },
        {
          "url": "https://git.kernel.org/stable/c/f7a785177611ffc97d645fcbc196e6de6ad2421d"
        },
        {
          "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"
      }
    }
  },
  "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": "2025-10-01T11:41:55.147Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50422\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-01T12:15:33.533\",\"lastModified\":\"2025-10-02T19:12:17.160\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2e12ce270f0d926085c1209cc90397e307deef97\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/46ba53c30666717cb06c2b3c5d896301cd00d0c0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a9e5176ead6de64f572ad5c87a72825d9d3c82ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e45a1516d2933703a4823d9db71e17c3abeba24f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f7a785177611ffc97d645fcbc196e6de6ad2421d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.