CVE-2021-47232

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 v3 8.4 HIGH

8.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705	Patch
https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678	Patch
https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256	Patch
https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22	Patch
https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705	Patch
https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678	Patch
https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256	Patch
https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc1::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc2::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc3::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc4::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc5::::::
	cpe:2.3:o:linux:linux_kernel:5.13:rc6::::::

History

No history.

Information

Published : 2024-05-21 15:15

Updated : 2025-04-04 14:31

NVD link : CVE-2021-47232

Mitre link : CVE-2021-47232

CVE.ORG link : CVE-2021-47232

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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