{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmac80211: fix use-after-free in CCMP/GCMP RX\n\nWhen PN checking is done in mac80211, for fragmentation we need\nto copy the PN to the RX struct so we can later use it to do a\ncomparison, since commit bf30ca922a0c (\"mac80211: check defrag\nPN against current frame\").\n\nUnfortunately, in that commit I used the 'hdr' variable without\nit being necessarily valid, so use-after-free could occur if it\nwas necessary to reallocate (parts of) the frame.\n\nFix this by reloading the variable after the code that results\nin the reallocations, if any.\n\nThis fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/mac80211/wpa.c"
               ],
               "versions": [
                  {
                     "version": "608b0a2ae928",
                     "lessThan": "447d001b875d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "d0f613fe6de3",
                     "lessThan": "31de381aef0a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "a9b57952fed4",
                     "lessThan": "f556e1d6fb9f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "0f716b48ed25",
                     "lessThan": "3d5d629c99c4",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c8b3a6150dc8",
                     "lessThan": "50149e0866a8",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e64ea0597050",
                     "lessThan": "57de2dcb1874",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "bf30ca922a0c",
                     "lessThan": "27d3eb5616ee",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "bf30ca922a0c",
                     "lessThan": "94513069eb54",
                     "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/mac80211/wpa.c"
               ],
               "versions": [
                  {
                     "version": "5.13",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.13",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.4.286",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.285",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.249",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.209",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.151",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.71",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.14.10",
                     "lessThanOrEqual": "5.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/447d001b875d0e7f211c4ba004916028da994258"
            },
            {
               "url": "https://git.kernel.org/stable/c/31de381aef0ab1b342f62485118dc8a19363dc78"
            },
            {
               "url": "https://git.kernel.org/stable/c/f556e1d6fb9f2923a9a36f3df638c7d79ba09dbb"
            },
            {
               "url": "https://git.kernel.org/stable/c/3d5d629c99c468458022e9b381789de3595bf4dd"
            },
            {
               "url": "https://git.kernel.org/stable/c/50149e0866a82cef33e680ee68dc380a5bc75d32"
            },
            {
               "url": "https://git.kernel.org/stable/c/57de2dcb18742dc2860861c9f496da7d42b67da0"
            },
            {
               "url": "https://git.kernel.org/stable/c/27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9"
            },
            {
               "url": "https://git.kernel.org/stable/c/94513069eb549737bcfc3d988d6ed4da948a2de8"
            }
         ],
         "title": "mac80211: fix use-after-free in CCMP/GCMP RX",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47388",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}