PT-2021-8045 · Linux+3 · Linux Kernel+3
Vincent Mailhol
·
Published
2021-12-07
·
Updated
2024-08-19
·
CVE-2021-47520
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 vulnerability in the
pch can rx normal function of the Linux kernel's CAN (Controller Area Network) driver. After calling netif receive skb(skb), dereferencing skb is unsafe, especially when the can frame cf aliases skb memory, which is dereferenced just after the call to netif receive skb(skb). This could potentially allow an attacker to impact the confidentiality, integrity, and availability of protected information. Reordering the lines solves the issue.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