cnvd - cnvd-2021-87040

cnvd-2021-87040

Vulnerability from cnvd

Title: Linux kernel资源管理错误漏洞（CNVD-2021-87040）

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存在资源管理错误漏洞，该漏洞源于当nouveau的postclose()在处理程序时，如果删除设备会发生use-after-frees。目前没有详细的漏洞细节提供。

Severity: 中

Patch Name: Linux kernel资源管理错误漏洞（CNVD-2021-87040）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存在资源管理错误漏洞，该漏洞源于当nouveau的postclose()在处理程序时，如果删除设备会发生use-after-frees。目前没有详细的漏洞细节提供。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:

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://lore.kernel.org/dri-devel/20201103194912.184413-2-jcline@redhat.com/。

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-27820

Impacted products

Name
Linux Linux kernel

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-27820"
    }
  },
  "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\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5f53nouveau\u7684postclose()\u5728\u5904\u7406\u7a0b\u5e8f\u65f6\uff0c\u5982\u679c\u5220\u9664\u8bbe\u5907\u4f1a\u53d1\u751fuse-after-frees\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://lore.kernel.org/dri-devel/20201103194912.184413-2-jcline@redhat.com/\u3002",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-87040",
  "openTime": "2021-11-07",
  "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\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5f53nouveau\u7684postclose()\u5728\u5904\u7406\u7a0b\u5e8f\u65f6\uff0c\u5982\u679c\u5220\u9664\u8bbe\u5907\u4f1a\u53d1\u751fuse-after-frees\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\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\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-87040\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-27820",
  "serverity": "\u4e2d",
  "submitTime": "2021-11-04",
  "title": "Linux kernel\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-87040\uff09"
}

CVE-2020-27820 (GCVE-0-2020-27820)

Vulnerability from cvelistv5

Published

2021-11-02 23:26

Modified

2024-08-04 16:25

Severity ?

CWE

CWE-416

Summary

A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could happen if removing device (that is not common to remove video card physically without power-off, but same happens if "unbind" the driver).

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=1901726	x_refsource_MISC
	https://lore.kernel.org/dri-devel/20201103194912.184413-2-jcline%40redhat.com/	x_refsource_MISC
	https://lore.kernel.org/dri-devel/20201103194912.184413-3-jcline%40redhat.com/	x_refsource_MISC
	https://lore.kernel.org/dri-devel/20201103194912.184413-4-jcline%40redhat.com/	x_refsource_MISC
	https://www.oracle.com/security-alerts/cpujul2022.html	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	kernel	Version: to be fixed in RHEL-9 release

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "providerMetadata": {
          "dateUpdated": "2024-08-04T16:25:43.062Z",
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          },
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            "url": "https://lore.kernel.org/dri-devel/20201103194912.184413-3-jcline%40redhat.com/"
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        "title": "CVE Program Container"
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    ],
    "cna": {
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          "versions": [
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    "dateReserved": "2020-10-27T00:00:00",
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    "state": "PUBLISHED"
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  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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