9.8
Critical
CVE-2021-47232 In the Linux kernel, the following vulnerability has been resolved: can: j1939: fix Use-after-Free, hold skb ref while…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 5.13 | earliest → < 5.13 | 5.13 |
| Linux 5.12 | earliest → < 5.12.13 | 5.12.13 |
| Linux 5.10 | earliest → < 5.10.46 | 5.10.46 |
| Linux | 5.4 | 5.4.128 |
| linux_kernel | 5.4 | No fix stated |
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