CVE-2023-53445 (GCVE-0-2023-53445)
Vulnerability from cvelistv5
Published
2025-09-18 16:04
Modified
2025-09-18 16:04
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: Fix a refcount bug in qrtr_recvmsg() Syzbot reported a bug as following: refcount_t: addition on 0; use-after-free. ... RIP: 0010:refcount_warn_saturate+0x17c/0x1f0 lib/refcount.c:25 ... Call Trace: <TASK> __refcount_add include/linux/refcount.h:199 [inline] __refcount_inc include/linux/refcount.h:250 [inline] refcount_inc include/linux/refcount.h:267 [inline] kref_get include/linux/kref.h:45 [inline] qrtr_node_acquire net/qrtr/af_qrtr.c:202 [inline] qrtr_node_lookup net/qrtr/af_qrtr.c:398 [inline] qrtr_send_resume_tx net/qrtr/af_qrtr.c:1003 [inline] qrtr_recvmsg+0x85f/0x990 net/qrtr/af_qrtr.c:1070 sock_recvmsg_nosec net/socket.c:1017 [inline] sock_recvmsg+0xe2/0x160 net/socket.c:1038 qrtr_ns_worker+0x170/0x1700 net/qrtr/ns.c:688 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 It occurs in the concurrent scenario of qrtr_recvmsg() and qrtr_endpoint_unregister() as following: cpu0 cpu1 qrtr_recvmsg qrtr_endpoint_unregister qrtr_send_resume_tx qrtr_node_release qrtr_node_lookup mutex_lock(&qrtr_node_lock) spin_lock_irqsave(&qrtr_nodes_lock, ) refcount_dec_and_test(&node->ref) [node->ref == 0] radix_tree_lookup [node != NULL] __qrtr_node_release qrtr_node_acquire spin_lock_irqsave(&qrtr_nodes_lock, ) kref_get(&node->ref) [WARNING] ... mutex_unlock(&qrtr_node_lock) Use qrtr_node_lock to protect qrtr_node_lookup() implementation, this is actually improving the protection of node reference.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0a7e0d0ef05440db03c3199e84d228db943b237f
Version: 0a7e0d0ef05440db03c3199e84d228db943b237f
Version: 0a7e0d0ef05440db03c3199e84d228db943b237f
Version: 0a7e0d0ef05440db03c3199e84d228db943b237f
Version: 0a7e0d0ef05440db03c3199e84d228db943b237f
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/qrtr/af_qrtr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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              "versionType": "git"
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            {
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              "status": "affected",
              "version": "0a7e0d0ef05440db03c3199e84d228db943b237f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/qrtr/af_qrtr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.107",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.178",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.107",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.24",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.11",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: Fix a refcount bug in qrtr_recvmsg()\n\nSyzbot reported a bug as following:\n\nrefcount_t: addition on 0; use-after-free.\n...\nRIP: 0010:refcount_warn_saturate+0x17c/0x1f0 lib/refcount.c:25\n...\nCall Trace:\n \u003cTASK\u003e\n __refcount_add include/linux/refcount.h:199 [inline]\n __refcount_inc include/linux/refcount.h:250 [inline]\n refcount_inc include/linux/refcount.h:267 [inline]\n kref_get include/linux/kref.h:45 [inline]\n qrtr_node_acquire net/qrtr/af_qrtr.c:202 [inline]\n qrtr_node_lookup net/qrtr/af_qrtr.c:398 [inline]\n qrtr_send_resume_tx net/qrtr/af_qrtr.c:1003 [inline]\n qrtr_recvmsg+0x85f/0x990 net/qrtr/af_qrtr.c:1070\n sock_recvmsg_nosec net/socket.c:1017 [inline]\n sock_recvmsg+0xe2/0x160 net/socket.c:1038\n qrtr_ns_worker+0x170/0x1700 net/qrtr/ns.c:688\n process_one_work+0x991/0x15c0 kernel/workqueue.c:2390\n worker_thread+0x669/0x1090 kernel/workqueue.c:2537\n\nIt occurs in the concurrent scenario of qrtr_recvmsg() and\nqrtr_endpoint_unregister() as following:\n\n\tcpu0\t\t\t\t\tcpu1\nqrtr_recvmsg\t\t\t\tqrtr_endpoint_unregister\nqrtr_send_resume_tx\t\t\tqrtr_node_release\nqrtr_node_lookup\t\t\tmutex_lock(\u0026qrtr_node_lock)\nspin_lock_irqsave(\u0026qrtr_nodes_lock, )\trefcount_dec_and_test(\u0026node-\u003eref) [node-\u003eref == 0]\nradix_tree_lookup [node != NULL]\t__qrtr_node_release\nqrtr_node_acquire\t\t\tspin_lock_irqsave(\u0026qrtr_nodes_lock, )\nkref_get(\u0026node-\u003eref) [WARNING]\t\t...\n\t\t\t\t\tmutex_unlock(\u0026qrtr_node_lock)\n\nUse qrtr_node_lock to protect qrtr_node_lookup() implementation, this\nis actually improving the protection of node reference."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-18T16:04:21.257Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/98a9cd82c541ef6cbdb829cd6c05cbbb471e373c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b9ba5906c42089f8e1d0001b7b50a7940f086cbb"
        },
        {
          "url": "https://git.kernel.org/stable/c/aa95efa187b4114075f312b3c4680d050b56fdec"
        },
        {
          "url": "https://git.kernel.org/stable/c/48a07f6e00d305597396da4d7494b81cec05b9d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/44d807320000db0d0013372ad39b53e12d52f758"
        }
      ],
      "title": "net: qrtr: Fix a refcount bug in qrtr_recvmsg()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53445",
    "datePublished": "2025-09-18T16:04:21.257Z",
    "dateReserved": "2025-09-17T14:54:09.753Z",
    "dateUpdated": "2025-09-18T16:04:21.257Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53445\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-18T16:15:48.817\",\"lastModified\":\"2025-09-19T16:00:27.847\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: qrtr: Fix a refcount bug in qrtr_recvmsg()\\n\\nSyzbot reported a bug as following:\\n\\nrefcount_t: addition on 0; use-after-free.\\n...\\nRIP: 0010:refcount_warn_saturate+0x17c/0x1f0 lib/refcount.c:25\\n...\\nCall Trace:\\n \u003cTASK\u003e\\n __refcount_add include/linux/refcount.h:199 [inline]\\n __refcount_inc include/linux/refcount.h:250 [inline]\\n refcount_inc include/linux/refcount.h:267 [inline]\\n kref_get include/linux/kref.h:45 [inline]\\n qrtr_node_acquire net/qrtr/af_qrtr.c:202 [inline]\\n qrtr_node_lookup net/qrtr/af_qrtr.c:398 [inline]\\n qrtr_send_resume_tx net/qrtr/af_qrtr.c:1003 [inline]\\n qrtr_recvmsg+0x85f/0x990 net/qrtr/af_qrtr.c:1070\\n sock_recvmsg_nosec net/socket.c:1017 [inline]\\n sock_recvmsg+0xe2/0x160 net/socket.c:1038\\n qrtr_ns_worker+0x170/0x1700 net/qrtr/ns.c:688\\n process_one_work+0x991/0x15c0 kernel/workqueue.c:2390\\n worker_thread+0x669/0x1090 kernel/workqueue.c:2537\\n\\nIt occurs in the concurrent scenario of qrtr_recvmsg() and\\nqrtr_endpoint_unregister() as following:\\n\\n\\tcpu0\\t\\t\\t\\t\\tcpu1\\nqrtr_recvmsg\\t\\t\\t\\tqrtr_endpoint_unregister\\nqrtr_send_resume_tx\\t\\t\\tqrtr_node_release\\nqrtr_node_lookup\\t\\t\\tmutex_lock(\u0026qrtr_node_lock)\\nspin_lock_irqsave(\u0026qrtr_nodes_lock, )\\trefcount_dec_and_test(\u0026node-\u003eref) [node-\u003eref == 0]\\nradix_tree_lookup [node != NULL]\\t__qrtr_node_release\\nqrtr_node_acquire\\t\\t\\tspin_lock_irqsave(\u0026qrtr_nodes_lock, )\\nkref_get(\u0026node-\u003eref) [WARNING]\\t\\t...\\n\\t\\t\\t\\t\\tmutex_unlock(\u0026qrtr_node_lock)\\n\\nUse qrtr_node_lock to protect qrtr_node_lookup() implementation, this\\nis actually improving the protection of node reference.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/44d807320000db0d0013372ad39b53e12d52f758\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/48a07f6e00d305597396da4d7494b81cec05b9d3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/98a9cd82c541ef6cbdb829cd6c05cbbb471e373c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aa95efa187b4114075f312b3c4680d050b56fdec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b9ba5906c42089f8e1d0001b7b50a7940f086cbb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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