CVE-2021-47407
"KVM Linux kernel Null Pointer Dereference"
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Handle SRCU initialization failure during page track init Check the return of init_srcu_struct(), which can fail due to OOM, when initializing the page track mechanism. Lack of checking leads to a NULL pointer deref found by a modified syzkaller. [Move the call towards the beginning of kvm_arch_init_vm. - Paolo]
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
Nov. 21, 2024, 6:36 a.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47407.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47407 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47407 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Mar. 04, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 from (excluding) 5.14.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (excluding) 5.10.71 Added Reference Type CVE: https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23 Types: Mailing List, Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23 Types: Mailing List, Patch Added Reference Type CVE: https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4 Types: Mailing List, Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4 Types: Mailing List, Patch Added Reference Type CVE: https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb Types: Mailing List, Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb Types: Mailing List, Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23 Added Reference https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4 Added Reference https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 21, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Handle SRCU initialization failure during page track init Check the return of init_srcu_struct(), which can fail due to OOM, when initializing the page track mechanism. Lack of checking leads to a NULL pointer deref found by a modified syzkaller. [Move the call towards the beginning of kvm_arch_init_vm. - Paolo] Added Reference kernel.org https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47407 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47407
weaknesses.