cve/published/2023/CVE-2023-52629.json

{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsh: push-switch: Reorder cleanup operations to avoid use-after-free bug\n\nThe original code puts flush_work() before timer_shutdown_sync()\nin switch_drv_remove(). Although we use flush_work() to stop\nthe worker, it could be rescheduled in switch_timer(). As a result,\na use-after-free bug can occur. The details are shown below:\n\n      (cpu 0)                    |      (cpu 1)\nswitch_drv_remove()              |\n flush_work()                    |\n  ...                            |  switch_timer // timer\n                                 |   schedule_work(&psw->work)\n timer_shutdown_sync()           |\n ...                             |  switch_work_handler // worker\n kfree(psw) // free              |\n                                 |   psw->state = 0 // use\n\nThis patch puts timer_shutdown_sync() before flush_work() to\nmitigate the bugs. As a result, the worker and timer will be\nstopped safely before the deallocate operations."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "arch/sh/drivers/push-switch.c"
               ],
               "versions": [
                  {
                     "version": "9f5e8eee5cfe1328660c71812d87c2a67bda389f",
                     "lessThan": "610dbd8ac271aa36080aac50b928d700ee3fe4de",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "9f5e8eee5cfe1328660c71812d87c2a67bda389f",
                     "lessThan": "246f80a0b17f8f582b2c0996db02998239057c65",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "arch/sh/drivers/push-switch.c"
               ],
               "versions": [
                  {
                     "version": "2.6.20",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "2.6.20",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.5.4",
                     "lessThanOrEqual": "6.5.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.6",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "cpeApplicability": [
            {
               "nodes": [
                  {
                     "operator": "OR",
                     "negate": false,
                     "cpeMatch": [
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "2.6.20",
                           "versionEndExcluding": "6.5.4"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "2.6.20",
                           "versionEndExcluding": "6.6"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/610dbd8ac271aa36080aac50b928d700ee3fe4de"
            },
            {
               "url": "https://git.kernel.org/stable/c/246f80a0b17f8f582b2c0996db02998239057c65"
            }
         ],
         "title": "sh: push-switch: Reorder cleanup operations to avoid use-after-free bug",
         "x_generator": {
            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2023-52629",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}