Vulnerability Details CVE-2021-47604
In the Linux kernel, the following vulnerability has been resolved:
vduse: check that offset is within bounds in get_config()
This condition checks "len" but it does not check "offset" and that
could result in an out of bounds read if "offset > dev->config_size".
The problem is that since both variables are unsigned the
"dev->config_size - offset" subtraction would result in a very high
unsigned value.
I think these checks might not be necessary because "len" and "offset"
are supposed to already have been validated using the
vhost_vdpa_config_validate() function. But I do not know the code
perfectly, and I like to be safe.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 3.3%
CVSS Severity
CVSS v3 Score 7.1
References
Products affected by CVE-2021-47604
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cpe:2.3:o:linux:linux_kernel:5.15
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cpe:2.3:o:linux:linux_kernel:5.15.0
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cpe:2.3:o:linux:linux_kernel:5.15.0-58
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cpe:2.3:o:linux:linux_kernel:5.15.1
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cpe:2.3:o:linux:linux_kernel:5.15.10
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cpe:2.3:o:linux:linux_kernel:5.15.2
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cpe:2.3:o:linux:linux_kernel:5.15.3
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cpe:2.3:o:linux:linux_kernel:5.15.4
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cpe:2.3:o:linux:linux_kernel:5.15.5
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cpe:2.3:o:linux:linux_kernel:5.15.6
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cpe:2.3:o:linux:linux_kernel:5.15.7
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cpe:2.3:o:linux:linux_kernel:5.15.8
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cpe:2.3:o:linux:linux_kernel:5.15.9