cnvd-2021-09807
Vulnerability from cnvd
Title
Linux kernel存在未明漏洞（CNVD-2021-09807）
Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 5.9.3之前版本存在安全漏洞，该漏洞源于io_uring接受对提交请求的进程的文件结构的未引用，导致execve()错误地优化unshare_fd()。目前没有详细漏洞细节提供。
Severity
高
Patch Name
Linux kernel存在未明漏洞（CNVD-2021-09807）的补丁
Patch Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 5.9.3之前版本存在安全漏洞，该漏洞源于io_uring接受对提交请求的进程的文件结构的未引用，导致execve()错误地优化unshare_fd()。目前没有详细漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。
Formal description

厂商已发布了漏洞修复程序，请及时关注更新：https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0f2122045b946241a9e549c2a76cea54fa58a7ff

Reference
https://nvd.nist.gov/vuln/detail/CVE-2020-29534
Impacted products
Name
Linux Linux kernel <5.9.3
Show details on source website

To clipboard 

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-29534",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-29534"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel 5.9.3\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eio_uring\u63a5\u53d7\u5bf9\u63d0\u4ea4\u8bf7\u6c42\u7684\u8fdb\u7a0b\u7684\u6587\u4ef6\u7ed3\u6784\u7684\u672a\u5f15\u7528\uff0c\u5bfc\u81f4execve()\u9519\u8bef\u5730\u4f18\u5316unshare_fd()\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1ahttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0f2122045b946241a9e549c2a76cea54fa58a7ff",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-09807",
  "openTime": "2021-02-07",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel 5.9.3\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eio_uring\u63a5\u53d7\u5bf9\u63d0\u4ea4\u8bf7\u6c42\u7684\u8fdb\u7a0b\u7684\u6587\u4ef6\u7ed3\u6784\u7684\u672a\u5f15\u7528\uff0c\u5bfc\u81f4execve()\u9519\u8bef\u5730\u4f18\u5316unshare_fd()\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Linux kernel\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-09807\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003c5.9.3"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-29534",
  "serverity": "\u9ad8",
  "submitTime": "2020-12-04",
  "title": "Linux kernel\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-09807\uff09"
}


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