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CVE-2021-47060 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: Stop looking for coalesced MMIO zones if the bus is destroyed Abort the walk of coalesced MMIO zones if kvm_io_bus_unregister_dev() fails to allocate memory for the new instance of the bus. If it can't instantiate a new bus, unregister_dev() destroys all devices _except_ the target device. But, it doesn't tell the caller that it obliterated the bus and invoked the destructor for all devices that were on the bus. In the coalesced MMIO case, this can result in a deleted list entry dereference due to attempting to continue iterating on coalesced_zones after future entries (in the walk) have been deleted. Opportunistically add curly braces to the for-loop, which encompasses many lines but sneaks by without braces due to the guts being a single if statement.


Severity



CVSS 4.0 Severity and Metrics:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/stable/c/168e82f640ed1891a700bdb43e37da354b2ab63c
https://git.kernel.org/stable/c/2a20592baff59c5351c5200ec667e1a2aa22af85
https://git.kernel.org/stable/c/50cbad42bfea8c052b7ca590bd4126cdc898713c
https://git.kernel.org/stable/c/5d3c4c79384af06e3c8e25b7770b6247496b4417
https://git.kernel.org/stable/c/7d1bc32d6477ff96a32695ea4be8144e4513ab2d

Weakness Enumeration

CWE-ID CWE Name Source

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47060
NVD Published Date:
02/29/2024
NVD Last Modified:
03/01/2024
Source:
kernel.org