PT-2021-8168 · Linux+5 · Linux Kernel+5
Ye Bin
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Published
2021-10-18
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Updated
2025-07-16
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CVE-2021-47191
CVSS v3.1
7.1
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to an out-of-bound read in the
resp readcap16() function. This can lead to a denial of service. The problem arises when the alloc len value is set to -1104926854, causing a huge arr len to be passed to fill from dev buffer(), but the arr is only 32 bytes, resulting in an out-of-bounds (OOB) condition in sg copy buffer().To solve this issue, it is recommended to define
alloc len as u32.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu