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CVE-2021-47232

HIGH
Published 2024-05-21T14:19:35.084Z
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CVSS Score

V3.1
8.4
/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.000
probability
of exploitation in the wild

There is a 0.0% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.109
Higher than 10.9% of all CVEs

Attack Vector Metrics

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Linux

Linux

Affected Versions:

9d71dd0c70099914fcd063135da3c580865e924c 9d71dd0c70099914fcd063135da3c580865e924c 9d71dd0c70099914fcd063135da3c580865e924c 9d71dd0c70099914fcd063135da3c580865e924c
Linux

Linux

Affected Versions:

5.4 0 5.4.128 5.10.46 5.12.13 5.13
linux

linux_kernel

Affected Versions:

9d71dd0c7009
linux

linux_kernel

Affected Versions:

9d71dd0c7009
linux

linux_kernel

Affected Versions:

9d71dd0c7009
linux

linux_kernel

Affected Versions:

9d71dd0c7009
linux

linux_kernel

Affected Versions:

5.4.128
linux

linux_kernel

Affected Versions:

5.10.46
linux

linux_kernel

Affected Versions:

5.12.13
linux

linux_kernel

Affected Versions:

5.13
linux

linux_kernel

Affected Versions:

0
linux

linux_kernel

Affected Versions:

5.4

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-rmqp-6x5x-g7fg

Advisory Details

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 Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-47232
WEB https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705
WEB https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678
WEB https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256
WEB https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22

Advisory provided by GitHub Security Advisory Database. Published: May 21, 2024, Modified: July 3, 2024

References

https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256
https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22
https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705
https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678
Published: 2024-05-21T14:19:35.084Z
Last Modified: 2025-05-04T07:06:48.551Z
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