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Vulnerability Details : CVE-2021-4095

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.
Publish Date : 2022-03-10 Last Update Date : 2022-07-28
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 476

- Products Affected By CVE-2021-4095

# Product Type Vendor Product Version Update Edition Language
1 OS Fedoraproject Fedora 34 * * * Version Details Vulnerabilities
2 OS Fedoraproject Fedora 35 * * * Version Details Vulnerabilities
3 OS Linux Linux Kernel * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Fedoraproject Fedora 2
Linux Linux Kernel 1

- References For CVE-2021-4095[email protected]/message/VT6573CGKVK3DU2632VVO5BVM4IU7SBV/
FEDORA FEDORA-2022-8efcea6e67[email protected]/message/QIOQN7JJNN6ABIDGRSTVZA65MHRLMH2Q/
FEDORA FEDORA-2022-0816754490
MLIST [oss-security] 20220117 Re: CVE-2021-4095: kernel: KVM: NULL pointer dereference in kvm_dirty_ring_get() in virt/kvm/dirty_ring.c

- Metasploit Modules Related To CVE-2021-4095

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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