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I. Basic Information for CVE-2021-22600
Vulnerability Information
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Vulnerability Title
Double Free in net/packet/af_packet.c leading to priviledge escalation
Source: NVD (National Vulnerability Database)
Vulnerability Description
A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
双重释放
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability 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 net/packet/af_packet.c 中的 packet_set_ring() 中的双重释放错误可以被本地用户通过精心设计的系统调用利用来提升权限或拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
Linux KernelKernel unspecified ~ 5.4.168 -
II. Public POCs for CVE-2021-22600
#POC DescriptionSource LinkShenlong Link
1kernal exploit 22600https://github.com/34rthq04k3/CVE-2021-22600POC Details
2kernal exploit 22600https://github.com/ragingkarson/CVE-2021-22600POC Details
3Nonehttps://github.com/sendINUX/CVE-2021-22600__DirtyPagetablePOC Details
4Proof-Of-Concept to check privileges of af_packet.c for validating the privileges acquired by any hacker upon successful exploitation of CVE-2021-22600https://github.com/Chinmay1743/af_packet.cPOC Details
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III. Intelligence Information for CVE-2021-22600
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IV. Related Vulnerabilities
Same product: Kernel
Same vendor: Linux Kernel
Same weakness: CWE-415
V. Comments for CVE-2021-22600

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