{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix slab-use-after-free in l2cap_connect()\n\nExtend a critical section to prevent chan from early freeing.\nAlso make the l2cap_connect() return type void. Nothing is using the\nreturned value but it is ugly to return a potentially freed pointer.\nMaking it void will help with backports because earlier kernels did use\nthe return value. Now the compile will break for kernels where this\npatch is not a complete fix.\n\nCall stack summary:\n\n[use]\nl2cap_bredr_sig_cmd\n  l2cap_connect\n  ┌ mutex_lock(&conn->chan_lock);\n  │ chan = pchan->ops->new_connection(pchan); <- alloc chan\n  │ __l2cap_chan_add(conn, chan);\n  │   l2cap_chan_hold(chan);\n  │   list_add(&chan->list, &conn->chan_l);   ... (1)\n  └ mutex_unlock(&conn->chan_lock);\n    chan->conf_state              ... (4) <- use after free\n\n[free]\nl2cap_conn_del\n┌ mutex_lock(&conn->chan_lock);\n│ foreach chan in conn->chan_l:            ... (2)\n│   l2cap_chan_put(chan);\n│     l2cap_chan_destroy\n│       kfree(chan)               ... (3) <- chan freed\n└ mutex_unlock(&conn->chan_lock);\n\n==================================================================\nBUG: KASAN: slab-use-after-free in instrument_atomic_read\ninclude/linux/instrumented.h:68 [inline]\nBUG: KASAN: slab-use-after-free in _test_bit\ninclude/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]\nBUG: KASAN: slab-use-after-free in l2cap_connect+0xa67/0x11a0\nnet/bluetooth/l2cap_core.c:4260\nRead of size 8 at addr ffff88810bf040a0 by task kworker/u3:1/311"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/bluetooth/l2cap_core.c"
               ],
               "versions": [
                  {
                     "version": "73ffa904b782",
                     "lessThan": "cfe560c7050b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "73ffa904b782",
                     "lessThan": "826af9d2f695",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "73ffa904b782",
                     "lessThan": "4d7b41c0e439",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/bluetooth/l2cap_core.c"
               ],
               "versions": [
                  {
                     "version": "3.0",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "3.0",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.32",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8.11",
                     "lessThanOrEqual": "6.8.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.9",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/cfe560c7050bfb37b0d2491bbe7cd8b59e77fdc5"
            },
            {
               "url": "https://git.kernel.org/stable/c/826af9d2f69567c646ff46d10393d47e30ad23c6"
            },
            {
               "url": "https://git.kernel.org/stable/c/4d7b41c0e43995b0e992b9f8903109275744b658"
            }
         ],
         "title": "Bluetooth: L2CAP: Fix slab-use-after-free in l2cap_connect()",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-36013",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}