vulnerability
Ubuntu: (CVE-2021-47232): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:N/C:C/I:C/A:C) | May 21, 2024 | Nov 19, 2024 | Jun 12, 2025 |
Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
May 21, 2024
Added
Nov 19, 2024
Modified
Jun 12, 2025
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.
Solution(s)
ubuntu-upgrade-linuxubuntu-upgrade-linux-awsubuntu-upgrade-linux-aws-5-4ubuntu-upgrade-linux-aws-fipsubuntu-upgrade-linux-azureubuntu-upgrade-linux-azure-5-4ubuntu-upgrade-linux-azure-fipsubuntu-upgrade-linux-bluefieldubuntu-upgrade-linux-fipsubuntu-upgrade-linux-gcpubuntu-upgrade-linux-gcp-5-4ubuntu-upgrade-linux-gcp-fipsubuntu-upgrade-linux-gkeopubuntu-upgrade-linux-hwe-5-4ubuntu-upgrade-linux-kvmubuntu-upgrade-linux-oracleubuntu-upgrade-linux-oracle-5-4ubuntu-upgrade-linux-raspiubuntu-upgrade-linux-raspi-5-4
References
- CVE-2021-47232
- https://attackerkb.com/topics/CVE-2021-47232
- URL-https://git.kernel.org/linus/2030043e616cab40f510299f09b636285e0a3678
- URL-https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705
- URL-https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678
- URL-https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256
- URL-https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22
- URL-https://www.cve.org/CVERecord?id=CVE-2021-47232
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