CVE-2021-4095
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I. Basic Information for CVE-2021-4095
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A NULL pointer dereference was found in the Linux kernel's KVM when dirty ring logging is enabled without an active vCPU context. An unprivileged local attacker on the host may use this flaw to cause a kernel oops condition and thus a denial of service by issuing a KVM_XEN_HVM_SET_ATTR ioctl. This flaw affects Linux kernel versions prior to 5.17-rc1.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 代码问题漏洞
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。KVM是其中的一个基于内核的虚拟机。overlayfs是其中的一套文件系统。 Linux Kernel 存在代码问题漏洞，攻击者可利用该漏洞通过kvm脏环get()强制在Linux内核上解除对NULL指针的引用，以触发拒绝服务。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | kernel | Linux kernel versions prior to 5.17-rc1 | - |
II. Public POCs for CVE-2021-4095
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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- https://bugzilla.redhat.com/show_bug.cgi?id=2031194x_refsource_MISC
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QIOQN7JJNN6ABIDGRSTVZA65MHRLMH2Q/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT6573CGKVK3DU2632VVO5BVM4IU7SBV/vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2021-4095
Same Patch Batch · n/a · 2022-03-08 · 9 CVEs total
| CVE-2022-0856 | libcaca 数字错误漏洞 | |
| CVE-2021-3981 | grub2 安全漏洞 | |
| CVE-2022-0516 | Linux kernel 缓冲区错误漏洞 | |
| CVE-2021-3698 | Cockpit 信任管理问题漏洞 | |
| CVE-2022-25225 | Network Olympus SQL注入漏洞 | |
| CVE-2022-24286 | Acer QuickAccess 授权问题漏洞 | |
| CVE-2022-24285 | Acer Care Center 授权问题漏洞 | |
| CVE-2021-28488 | Ericsson Network Manage安全漏洞 |
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Information Leakage in kernel
Same vendor: n/a
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V. Comments for CVE-2021-4095
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