CVE-2025-68305 (GCVE-0-2025-68305)
Vulnerability from cvelistv5
Published
2025-12-16 15:06
Modified
2025-12-16 15:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sock: Prevent race in socket write iter and sock bind There is a potential race condition between sock bind and socket write iter. bind may free the same cmd via mgmt_pending before write iter sends the cmd, just as syzbot reported in UAF[1]. Here we use hci_dev_lock to synchronize the two, thereby avoiding the UAF mentioned in [1]. [1] syzbot reported: BUG: KASAN: slab-use-after-free in mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316 Read of size 8 at addr ffff888077164818 by task syz.0.17/5989 Call Trace: mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316 set_link_security+0x5c2/0x710 net/bluetooth/mgmt.c:1918 hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719 hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 sock_write_iter+0x279/0x360 net/socket.c:1195 Allocated by task 5989: mgmt_pending_add+0x35/0x140 net/bluetooth/mgmt_util.c:296 set_link_security+0x557/0x710 net/bluetooth/mgmt.c:1910 hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719 hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 sock_write_iter+0x279/0x360 net/socket.c:1195 Freed by task 5991: mgmt_pending_free net/bluetooth/mgmt_util.c:311 [inline] mgmt_pending_foreach+0x30d/0x380 net/bluetooth/mgmt_util.c:257 mgmt_index_removed+0x112/0x2f0 net/bluetooth/mgmt.c:9477 hci_sock_bind+0xbe9/0x1000 net/bluetooth/hci_sock.c:1314
References
Impacted products
Vendor Product Version
Linux Linux Version: bdd56875c6926d8009914f427df71797693e90d4
Version: 4e83f2dbb2bf677e614109df24426c4dded472d4
Version: 6fe26f694c824b8a4dbf50c635bee1302e3f099c
Version: 6fe26f694c824b8a4dbf50c635bee1302e3f099c
Version: d7882db79135c829a922daf3571f33ea1e056ae3
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fe68510fc99bb4b88c9c611f83699749002d515a",
              "status": "affected",
              "version": "bdd56875c6926d8009914f427df71797693e90d4",
              "versionType": "git"
            },
            {
              "lessThan": "e90c05fc5bbea956450a05cc3b36b8fa29cf195e",
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              "version": "4e83f2dbb2bf677e614109df24426c4dded472d4",
              "versionType": "git"
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              "status": "affected",
              "version": "6fe26f694c824b8a4dbf50c635bee1302e3f099c",
              "versionType": "git"
            },
            {
              "lessThan": "89bb613511cc21ed5ba6bddc1c9b9ae9c0dad392",
              "status": "affected",
              "version": "6fe26f694c824b8a4dbf50c635bee1302e3f099c",
              "versionType": "git"
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            {
              "status": "affected",
              "version": "d7882db79135c829a922daf3571f33ea1e056ae3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.119",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.61",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.119",
                  "versionStartIncluding": "6.6.94",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.61",
                  "versionStartIncluding": "6.12.34",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.11",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.15.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sock: Prevent race in socket write iter and sock bind\n\nThere is a potential race condition between sock bind and socket write\niter. bind may free the same cmd via mgmt_pending before write iter sends\nthe cmd, just as syzbot reported in UAF[1].\n\nHere we use hci_dev_lock to synchronize the two, thereby avoiding the\nUAF mentioned in [1].\n\n[1]\nsyzbot reported:\nBUG: KASAN: slab-use-after-free in mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316\nRead of size 8 at addr ffff888077164818 by task syz.0.17/5989\nCall Trace:\n mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316\n set_link_security+0x5c2/0x710 net/bluetooth/mgmt.c:1918\n hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719\n hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839\n sock_sendmsg_nosec net/socket.c:727 [inline]\n __sock_sendmsg+0x21c/0x270 net/socket.c:742\n sock_write_iter+0x279/0x360 net/socket.c:1195\n\nAllocated by task 5989:\n mgmt_pending_add+0x35/0x140 net/bluetooth/mgmt_util.c:296\n set_link_security+0x557/0x710 net/bluetooth/mgmt.c:1910\n hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719\n hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839\n sock_sendmsg_nosec net/socket.c:727 [inline]\n __sock_sendmsg+0x21c/0x270 net/socket.c:742\n sock_write_iter+0x279/0x360 net/socket.c:1195\n\nFreed by task 5991:\n mgmt_pending_free net/bluetooth/mgmt_util.c:311 [inline]\n mgmt_pending_foreach+0x30d/0x380 net/bluetooth/mgmt_util.c:257\n mgmt_index_removed+0x112/0x2f0 net/bluetooth/mgmt.c:9477\n hci_sock_bind+0xbe9/0x1000 net/bluetooth/hci_sock.c:1314"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-16T15:06:22.812Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fe68510fc99bb4b88c9c611f83699749002d515a"
        },
        {
          "url": "https://git.kernel.org/stable/c/e90c05fc5bbea956450a05cc3b36b8fa29cf195e"
        },
        {
          "url": "https://git.kernel.org/stable/c/69fcb0344bc0dd5b13d7e4e98f8b6bf25a6d4ff7"
        },
        {
          "url": "https://git.kernel.org/stable/c/89bb613511cc21ed5ba6bddc1c9b9ae9c0dad392"
        }
      ],
      "title": "Bluetooth: hci_sock: Prevent race in socket write iter and sock bind",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68305",
    "datePublished": "2025-12-16T15:06:22.812Z",
    "dateReserved": "2025-12-16T14:48:05.294Z",
    "dateUpdated": "2025-12-16T15:06:22.812Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68305\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T16:16:10.030\",\"lastModified\":\"2025-12-18T15:08:06.237\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: hci_sock: Prevent race in socket write iter and sock bind\\n\\nThere is a potential race condition between sock bind and socket write\\niter. bind may free the same cmd via mgmt_pending before write iter sends\\nthe cmd, just as syzbot reported in UAF[1].\\n\\nHere we use hci_dev_lock to synchronize the two, thereby avoiding the\\nUAF mentioned in [1].\\n\\n[1]\\nsyzbot reported:\\nBUG: KASAN: slab-use-after-free in mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316\\nRead of size 8 at addr ffff888077164818 by task syz.0.17/5989\\nCall Trace:\\n mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316\\n set_link_security+0x5c2/0x710 net/bluetooth/mgmt.c:1918\\n hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719\\n hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839\\n sock_sendmsg_nosec net/socket.c:727 [inline]\\n __sock_sendmsg+0x21c/0x270 net/socket.c:742\\n sock_write_iter+0x279/0x360 net/socket.c:1195\\n\\nAllocated by task 5989:\\n mgmt_pending_add+0x35/0x140 net/bluetooth/mgmt_util.c:296\\n set_link_security+0x557/0x710 net/bluetooth/mgmt.c:1910\\n hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719\\n hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839\\n sock_sendmsg_nosec net/socket.c:727 [inline]\\n __sock_sendmsg+0x21c/0x270 net/socket.c:742\\n sock_write_iter+0x279/0x360 net/socket.c:1195\\n\\nFreed by task 5991:\\n mgmt_pending_free net/bluetooth/mgmt_util.c:311 [inline]\\n mgmt_pending_foreach+0x30d/0x380 net/bluetooth/mgmt_util.c:257\\n mgmt_index_removed+0x112/0x2f0 net/bluetooth/mgmt.c:9477\\n hci_sock_bind+0xbe9/0x1000 net/bluetooth/hci_sock.c:1314\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/69fcb0344bc0dd5b13d7e4e98f8b6bf25a6d4ff7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/89bb613511cc21ed5ba6bddc1c9b9ae9c0dad392\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e90c05fc5bbea956450a05cc3b36b8fa29cf195e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fe68510fc99bb4b88c9c611f83699749002d515a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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