CVE-2021-47407
MEDIUMLinux Kernel < 5.10.71 - NULL Pointer Dereference in KVM Page Track Initialization
Title source: llmDescription
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]
References (3)
Core 3
Core References
Mailing List, Patch
https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4
Mailing List, Patch
https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23
Mailing List, Patch
https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb
Scores
CVSS v3
5.5
EPSS
0.0025
EPSS Percentile
16.2%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-476
Status
published
Products (10)
Linux/Linux
< 4.6
Linux/Linux
0eb05bf290cfe8610d9680b49abef37febd1c38a - 4664318f73e496cd22c71b10888e75434a123e23
Linux/Linux
0eb05bf290cfe8610d9680b49abef37febd1c38a - deb2949417677649e2413266d7ce8c2ff73952b4
Linux/Linux
0eb05bf290cfe8610d9680b49abef37febd1c38a - eb7511bf9182292ef1df1082d23039e856d1ddfb
Linux/Linux
4.6
Linux/Linux
5.10.71 - 5.10.*
Linux/Linux
5.14.10 - 5.14.*
Linux/Linux
5.15
linux/linux_kernel
5.15 rc1 (3 CPE variants)
linux/linux_kernel
< 5.10.71
Published
May 21, 2024
Tracked Since
Feb 18, 2026