Vulnerability-Lookup

CNVD-2020-28266

Vulnerability from cnvd - Published: 2020-05-14

Title

Linux kernel存在未明漏洞（CNVD-2020-28266）

Description

Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。 Linux kernel 5.6.11及之前版本中的drivers/md/bcache/btree.c文件的‘btree_gc_coalesce’函数存在安全漏洞。攻击者可利用该漏洞导致进程死锁。

Severity

中

Patch Name

Linux kernel存在未明漏洞（CNVD-2020-28266）的补丁

Patch Description

Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。 Linux kernel 5.6.11及之前版本中的drivers/md/bcache/btree.c文件的‘btree_gc_coalesce’函数存在安全漏洞。攻击者可利用该漏洞导致进程死锁。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，详情请关注厂商主页： https://www.kernel.org/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-12771

Impacted products

Name
Linux Kernel <=5.6.11

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2020-12771"
    }
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  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8be6\u60c5\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\uff1a\r\nhttps://www.kernel.org/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-28266",
  "openTime": "2020-05-14",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel 5.6.11\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u7684drivers/md/bcache/btree.c\u6587\u4ef6\u7684\u2018btree_gc_coalesce\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u8fdb\u7a0b\u6b7b\u9501\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-2020-28266\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Kernel \u003c=5.6.11"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-12771",
  "serverity": "\u4e2d",
  "submitTime": "2020-05-11",
  "title": "Linux kernel\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2020-28266\uff09"
}

CVE-2020-12771 (GCVE-0-2020-12771)

Vulnerability from cvelistv5 – Published: 2020-05-09 20:16 – Updated: 2024-08-04 12:04

Summary

An issue was discovered in the Linux kernel through 5.6.11. btree_gc_coalesce in drivers/md/bcache/btree.c has a deadlock if a coalescing operation fails.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

13 references

URL	Tags
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4463-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4465-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4462-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4483-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4485-1/	vendor-advisoryx_refsource_UBUNTU
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://www.oracle.com/security-alerts/cpuApr2021.html	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2020060…	x_refsource_CONFIRM
https://lkml.org/lkml/2020/4/26/87	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.