Security Advisory

CVE-2021-47232

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2024-05-21 14:19:35

Last updated 2026-05-11 13:50:30

Assigner Linux

State PUBLISHED

Description

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.

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