media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()

{
  "id": "440c56298b31ca87b957ccfabf287422b7947493ad828f94b6f8d4a9ebdbfb9a",
  "url": "https://osv.dev/vulnerability/CVE-2022-50272",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer() Wei Chen reports a kernel bug as blew: general protection fault, probably for non-canonical address KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] ... Call Trace: __i2c_transfer+0x77e/0x1930 drivers/i2c/i2c-core-base.c:2109 i2c_transfer+0x1d5/0x3d0 drivers/i2c/i2c-core-base.c:2170 i2cdev_ioctl_rdwr+0x393/0x660 drivers/i2c/i2c-dev.c:297 i2cdev_ioctl+0x75d/0x9f0 drivers/i2c/i2c-dev.c:458 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd834a8bded In az6027_i2c_xfer(), if msg[i].addr is 0x99, a null-ptr-deref will caused when accessing msg[i].buf. For msg[i].len is 0 and msg[i].buf is null. Fix this by checking msg[i].len in az6027_i2c_xfer().",
    "evidence": "osv:CVE-2022-50272",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50272",
      "aliases": [
        "CVE-2022-50272"
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      "modified": "2026-10-28T02:30:46.787733934Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0ed554fd769a19ea8464bb83e9ac201002ef74ad",
        "https://git.kernel.org/stable/c/210fcf64be4db82c0e190e74b5111e4eef661a7a",
        "https://git.kernel.org/stable/c/2b6a8a1a32746981044e7ab06649c804acb4068a",
        "https://git.kernel.org/stable/c/559891d430e3f3a178040c4371ed419edbfa7d65",
        "https://git.kernel.org/stable/c/6b60cf73a931af34b7a0a3f467a79d9fe0df2d70",
        "https://git.kernel.org/stable/c/6fbc44731a4665cbe92a5090e9804a388a72214b",
        "https://git.kernel.org/stable/c/7abfe467cd685f5da7ecb415441e45e3e4e2baa8",
        "https://git.kernel.org/stable/c/8b256d23361c51aa4b7fdb71176c1ca50966fb39",
        "https://git.kernel.org/stable/c/c712d1ccbfb787620422b437a5b8fac0802547bd",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50272.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50272",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50272.json"
      }
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        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 514447,
  "published_at": "2025-09-15T14:21:08.534+00:00"
}