Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.4, < 5.4.128 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705Patch
- https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678Patch
- https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256Patch
- https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22Patch
- https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705Patch
- https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678Patch
- https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256Patch
- https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22Patch
FAQ
What is CVE-2021-47232?
CVE-2021-47232 is a vulnerability with a CVSS score of 8.4 (HIGH). 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 t...
How severe is CVE-2021-47232?
CVE-2021-47232 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47232?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.