CVE-2021-47232: can: j1939: fix Use-after-Free, hold skb ref while in use
In the Linux kernel, the following vulnerability has been resolved:
can: j1939: fix Use-after-Free, hold skb ref while in use
This patch fixes a Use-after-Free found by the syzbot.
The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2021-47232?
CVE-2021-47232 has been classified as a medium severity vulnerability.
How do I fix CVE-2021-47232?
To fix CVE-2021-47232, update your Linux kernel to a version that includes the patch, such as versions beyond 5.13-rc6.
What type of vulnerability is CVE-2021-47232?
CVE-2021-47232 is a Use-after-Free vulnerability in the Linux kernel.
Which versions of the Linux kernel are affected by CVE-2021-47232?
CVE-2021-47232 affects Linux kernel versions from 5.4 to 5.13-rc6.
Is CVE-2021-47232 exploitable remotely?
Yes, CVE-2021-47232 can potentially be exploited remotely, which may lead to arbitrary code execution.