PT-2021-8048 · Linux+3 · Linux Kernel+3
Zhou Qingyang
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Published
2021-12-01
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Updated
2024-08-19
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CVE-2021-47541
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to a use-after-free bug in the
mlx4 en try alloc resources() function. This bug could lead to a use-after-free problem when mlx4 en copy priv() fails, causing tmp->tx cq to be freed, and then mlx4 en alloc resources() is called, resulting in a dereference of &tmp->tx cq[t][i]. The bug was found by a static analyzer using differential checking to identify inconsistent security operations between two code paths. It is noted that this bug could be a false positive or hard to trigger, and multiple researchers have cross-reviewed it.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Red Os
Suse