CVE-2023-53578 (GCVE-0-2023-53578)
Vulnerability from cvelistv5
Published
2025-10-04 15:17
Modified
2025-10-04 15:17
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume() Syzbot reported a bug as following: ===================================================== BUG: KMSAN: uninit-value in qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230 qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230 qrtr_endpoint_post+0xf85/0x11b0 net/qrtr/af_qrtr.c:519 qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108 call_write_iter include/linux/fs.h:2189 [inline] aio_write+0x63a/0x950 fs/aio.c:1600 io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019 __do_sys_io_submit fs/aio.c:2078 [inline] __se_sys_io_submit+0x293/0x770 fs/aio.c:2048 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was created at: slab_post_alloc_hook mm/slab.h:766 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node_track_caller+0x114/0x3b0 mm/slab_common.c:988 kmalloc_reserve net/core/skbuff.c:492 [inline] __alloc_skb+0x3af/0x8f0 net/core/skbuff.c:565 __netdev_alloc_skb+0x120/0x7d0 net/core/skbuff.c:630 qrtr_endpoint_post+0xbd/0x11b0 net/qrtr/af_qrtr.c:446 qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108 call_write_iter include/linux/fs.h:2189 [inline] aio_write+0x63a/0x950 fs/aio.c:1600 io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019 __do_sys_io_submit fs/aio.c:2078 [inline] __se_sys_io_submit+0x293/0x770 fs/aio.c:2048 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd It is because that skb->len requires at least sizeof(struct qrtr_ctrl_pkt) in qrtr_tx_resume(). And skb->len equals to size in qrtr_endpoint_post(). But size is less than sizeof(struct qrtr_ctrl_pkt) when qrtr_cb->type equals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() under the syzbot scenario. This triggers the uninit variable access bug. Add size check when qrtr_cb->type equals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() to fix the bug.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5fdeb0d372ab33b4175043a2a4a1730239a217f1
Version: 5fdeb0d372ab33b4175043a2a4a1730239a217f1
Version: 5fdeb0d372ab33b4175043a2a4a1730239a217f1
Version: 5fdeb0d372ab33b4175043a2a4a1730239a217f1
Version: 5fdeb0d372ab33b4175043a2a4a1730239a217f1
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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",
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              "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": "5.15.108",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.25",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.12",
              "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": "5.15.108",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.25",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.12",
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                  "versionEndExcluding": "6.3",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()\n\nSyzbot reported a bug as following:\n\n=====================================================\nBUG: KMSAN: uninit-value in qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230\n qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230\n qrtr_endpoint_post+0xf85/0x11b0 net/qrtr/af_qrtr.c:519\n qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108\n call_write_iter include/linux/fs.h:2189 [inline]\n aio_write+0x63a/0x950 fs/aio.c:1600\n io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019\n __do_sys_io_submit fs/aio.c:2078 [inline]\n __se_sys_io_submit+0x293/0x770 fs/aio.c:2048\n __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was created at:\n slab_post_alloc_hook mm/slab.h:766 [inline]\n slab_alloc_node mm/slub.c:3452 [inline]\n __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491\n __do_kmalloc_node mm/slab_common.c:967 [inline]\n __kmalloc_node_track_caller+0x114/0x3b0 mm/slab_common.c:988\n kmalloc_reserve net/core/skbuff.c:492 [inline]\n __alloc_skb+0x3af/0x8f0 net/core/skbuff.c:565\n __netdev_alloc_skb+0x120/0x7d0 net/core/skbuff.c:630\n qrtr_endpoint_post+0xbd/0x11b0 net/qrtr/af_qrtr.c:446\n qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108\n call_write_iter include/linux/fs.h:2189 [inline]\n aio_write+0x63a/0x950 fs/aio.c:1600\n io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019\n __do_sys_io_submit fs/aio.c:2078 [inline]\n __se_sys_io_submit+0x293/0x770 fs/aio.c:2048\n __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nIt is because that skb-\u003elen requires at least sizeof(struct qrtr_ctrl_pkt)\nin qrtr_tx_resume(). And skb-\u003elen equals to size in qrtr_endpoint_post().\nBut size is less than sizeof(struct qrtr_ctrl_pkt) when qrtr_cb-\u003etype\nequals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() under the syzbot\nscenario. This triggers the uninit variable access bug.\n\nAdd size check when qrtr_cb-\u003etype equals to QRTR_TYPE_RESUME_TX in\nqrtr_endpoint_post() to fix the bug."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-04T15:17:17.350Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3814d211ff13ee35f2d9437439a6c7df58524137"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6a796ee5a639ffb83c6e5469408cc2ec16cac6a"
        },
        {
          "url": "https://git.kernel.org/stable/c/bef57c227b52c2bde00fad33556175d36d12cfa0"
        },
        {
          "url": "https://git.kernel.org/stable/c/8c9ce34a6ff2c544f96ce0b088e8fd3c1b9698c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/6417070918de3bcdbe0646e7256dae58fd8083ba"
        }
      ],
      "title": "net: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53578",
    "datePublished": "2025-10-04T15:17:17.350Z",
    "dateReserved": "2025-10-04T15:14:15.926Z",
    "dateUpdated": "2025-10-04T15:17:17.350Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53578\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-04T16:15:53.483\",\"lastModified\":\"2025-10-06T14:56:21.733\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: qrtr: Fix an uninit variable access bug in qrtr_tx_resume()\\n\\nSyzbot reported a bug as following:\\n\\n=====================================================\\nBUG: KMSAN: uninit-value in qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230\\n qrtr_tx_resume+0x185/0x1f0 net/qrtr/af_qrtr.c:230\\n qrtr_endpoint_post+0xf85/0x11b0 net/qrtr/af_qrtr.c:519\\n qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108\\n call_write_iter include/linux/fs.h:2189 [inline]\\n aio_write+0x63a/0x950 fs/aio.c:1600\\n io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019\\n __do_sys_io_submit fs/aio.c:2078 [inline]\\n __se_sys_io_submit+0x293/0x770 fs/aio.c:2048\\n __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nUninit was created at:\\n slab_post_alloc_hook mm/slab.h:766 [inline]\\n slab_alloc_node mm/slub.c:3452 [inline]\\n __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491\\n __do_kmalloc_node mm/slab_common.c:967 [inline]\\n __kmalloc_node_track_caller+0x114/0x3b0 mm/slab_common.c:988\\n kmalloc_reserve net/core/skbuff.c:492 [inline]\\n __alloc_skb+0x3af/0x8f0 net/core/skbuff.c:565\\n __netdev_alloc_skb+0x120/0x7d0 net/core/skbuff.c:630\\n qrtr_endpoint_post+0xbd/0x11b0 net/qrtr/af_qrtr.c:446\\n qrtr_tun_write_iter+0x270/0x400 net/qrtr/tun.c:108\\n call_write_iter include/linux/fs.h:2189 [inline]\\n aio_write+0x63a/0x950 fs/aio.c:1600\\n io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019\\n __do_sys_io_submit fs/aio.c:2078 [inline]\\n __se_sys_io_submit+0x293/0x770 fs/aio.c:2048\\n __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nIt is because that skb-\u003elen requires at least sizeof(struct qrtr_ctrl_pkt)\\nin qrtr_tx_resume(). And skb-\u003elen equals to size in qrtr_endpoint_post().\\nBut size is less than sizeof(struct qrtr_ctrl_pkt) when qrtr_cb-\u003etype\\nequals to QRTR_TYPE_RESUME_TX in qrtr_endpoint_post() under the syzbot\\nscenario. This triggers the uninit variable access bug.\\n\\nAdd size check when qrtr_cb-\u003etype equals to QRTR_TYPE_RESUME_TX in\\nqrtr_endpoint_post() to fix the bug.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3814d211ff13ee35f2d9437439a6c7df58524137\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6417070918de3bcdbe0646e7256dae58fd8083ba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8c9ce34a6ff2c544f96ce0b088e8fd3c1b9698c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bef57c227b52c2bde00fad33556175d36d12cfa0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c6a796ee5a639ffb83c6e5469408cc2ec16cac6a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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