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CVE-2021-47095

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ipmi: ssif: initialize ssif_info->client early During probe ssif_info->client is dereferenced in error path.

Published Mar 4, 2024CWE-476EPSS 0.23%

Overview

CVE-2021-47095 is a medium-severity vulnerability. It was published on March 4, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ipmi: ssif: initialize ssif_info->client early

During probe ssif_info->client is dereferenced in error path. However,

it is set when some of the error checking has already been done. This

causes following kernel crash if an error path is taken:

[ 30.645593][ T674] ipmi_ssif 0-000e: ipmi_ssif: Not probing, Interface already present

[ 30.657616][ T674] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000088

...

[ 30.657723][ T674] pc : __dev_printk+0x28/0xa0

[ 30.657732][ T674] lr : _dev_err+0x7c/0xa0

...

[ 30.657772][ T674] Call trace:

[ 30.657775][ T674] __dev_printk+0x28/0xa0

[ 30.657778][ T674] _dev_err+0x7c/0xa0

[ 30.657781][ T674] ssif_probe+0x548/0x900 [ipmi_ssif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e]

[ 30.657791][ T674] i2c_device_probe+0x37c/0x3c0

...

Initialize ssif_info->client before any error path can be taken. Clear

i2c_client data in the er

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7cRefgit.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15Refgit.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29Refgit.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94afRefgit.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7cRefgit.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15Refgit.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29Refgit.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47095?

CVE-2021-47095 is a medium-severity vulnerability. It was published on March 4, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47095?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47095?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47095?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47095 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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