CVE-2021-47061
KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU If allocating a new instance of an I/O bus fails when unregistering a device, wait to destroy the device until after all readers are guaranteed to see the new null bus. Destroying devices before the bus is nullified could lead to use-after-free since readers expect the devices on their reference of the bus to remain valid.
INFO
Published Date :
Feb. 29, 2024, 11:15 p.m.
Last Modified :
Dec. 10, 2024, 4:55 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the affected kernel packages.
- Update the affected packages.
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-2021-47061.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47061 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-2021-47061
weaknesses.
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-2021-47061 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47061 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.
-
Initial Analysis by [email protected]
Dec. 10, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.9 up to (excluding) 5.10.37 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.11.21 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.12.4 Changed Reference Type https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343 No Types Assigned https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343 Patch Changed Reference Type https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343 No Types Assigned https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343 Patch Changed Reference Type https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250 No Types Assigned https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250 Patch Changed Reference Type https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250 No Types Assigned https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250 Patch Changed Reference Type https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d No Types Assigned https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d Patch Changed Reference Type https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d No Types Assigned https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d Patch Changed Reference Type https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927 No Types Assigned https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927 Patch Changed Reference Type https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927 No Types Assigned https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927 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/03c6cccedd3913006744faa252a4da5145299343 Added Reference https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250 Added Reference https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d Added Reference https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 29, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU If allocating a new instance of an I/O bus fails when unregistering a device, wait to destroy the device until after all readers are guaranteed to see the new null bus. Destroying devices before the bus is nullified could lead to use-after-free since readers expect the devices on their reference of the bus to remain valid. Added Reference Linux https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250 [No types assigned]