{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix race between mmput() and do_exit()\n\nTask A calls binder_update_page_range() to allocate and insert pages on\na remote address space from Task B. For this, Task A pins the remote mm\nvia mmget_not_zero() first. This can race with Task B do_exit() and the\nfinal mmput() refcount decrement will come from Task A.\n\n  Task A            | Task B\n  ------------------+------------------\n  mmget_not_zero()  |\n                    |  do_exit()\n                    |    exit_mm()\n                    |      mmput()\n  mmput()           |\n    exit_mmap()     |\n      remove_vma()  |\n        fput()      |\n\nIn this case, the work of ____fput() from Task B is queued up in Task A\nas TWA_RESUME. So in theory, Task A returns to userspace and the cleanup\nwork gets executed. However, Task A instead sleep, waiting for a reply\nfrom Task B that never comes (it's dead).\n\nThis means the binder_deferred_release() is blocked until an unrelated\nbinder event forces Task A to go back to userspace. All the associated\ndeath notifications will also be delayed until then.\n\nIn order to fix this use mmput_async() that will schedule the work in\nthe corresponding mm->async_put_work WQ instead of Task A."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/android/binder_alloc.c"
               ],
               "versions": [
                  {
                     "version": "457b9a6f09f0",
                     "lessThan": "95b1d336b064",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "457b9a6f09f0",
                     "lessThan": "252a2a5569eb",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "457b9a6f09f0",
                     "lessThan": "7e7a0d86542b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "457b9a6f09f0",
                     "lessThan": "98fee5bee97a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "457b9a6f09f0",
                     "lessThan": "6696f76c32ff",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "457b9a6f09f0",
                     "lessThan": "67f16bf2cc16",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "457b9a6f09f0",
                     "lessThan": "77d210e8db4d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "457b9a6f09f0",
                     "lessThan": "9a9ab0d96362",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/android/binder_alloc.c"
               ],
               "versions": [
                  {
                     "version": "2.6.29",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "2.6.29",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.306",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.268",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.209",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.148",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.75",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.14",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7.2",
                     "lessThanOrEqual": "6.7.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/95b1d336b0642198b56836b89908d07b9a0c9608"
            },
            {
               "url": "https://git.kernel.org/stable/c/252a2a5569eb9f8d16428872cc24dea1ac0bb097"
            },
            {
               "url": "https://git.kernel.org/stable/c/7e7a0d86542b0ea903006d3f42f33c4f7ead6918"
            },
            {
               "url": "https://git.kernel.org/stable/c/98fee5bee97ad47b527a997d5786410430d1f0e9"
            },
            {
               "url": "https://git.kernel.org/stable/c/6696f76c32ff67fec26823fc2df46498e70d9bf3"
            },
            {
               "url": "https://git.kernel.org/stable/c/67f16bf2cc1698fd50e01ee8a2becc5a8e6d3a3e"
            },
            {
               "url": "https://git.kernel.org/stable/c/77d210e8db4d61d43b2d16df66b1ec46fad2ee01"
            },
            {
               "url": "https://git.kernel.org/stable/c/9a9ab0d963621d9d12199df9817e66982582d5a5"
            }
         ],
         "title": "binder: fix race between mmput() and do_exit()",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2023-52609",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}