CVE-2021-47095

ipmi: ssif: initialize ssif_info->client early

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 error path to prevent the dangling pointer from leaking.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af patch
https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c patch
https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 patch
https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 patch

Frequently Asked Questions

What is the severity of CVE-2021-47095?
CVE-2021-47095 has been scored as a medium severity vulnerability.
How to fix CVE-2021-47095?
To fix CVE-2021-47095, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47095 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-47095 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47095?
CVE-2021-47095 affects Linux Linux, Linux Linux.
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