Riskcovery

CVE-2021-47095

ipmi: ssif: initialize ssif_info->client early

State
Published
Severity
Not scored
Published
Mar 4, 2024
Updated
May 11, 2026
Reserved
Feb 29, 2024

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • c4436c9149c5d2bc0c49ab57ec85c75ea1c4d61c to before 8efd6a3391f7b0b19fb0c38e50add06ca30c94afAffected
  • c4436c9149c5d2bc0c49ab57ec85c75ea1c4d61c to before 1f6ab847461ce7dd89ae9db2dd4658c993355d7cAffected
  • c4436c9149c5d2bc0c49ab57ec85c75ea1c4d61c to before 77a7311ca167aa5b7055c549a940a56e73ee5f29Affected
  • c4436c9149c5d2bc0c49ab57ec85c75ea1c4d61c to before 34f35f8f14bc406efc06ee4ff73202c6fd245d15Affected
LinuxLinux
  • 5.4Affected
  • before 5.4Not affected
  • 5.4.169 through 5.4.*Not affected
  • 5.10.89 through 5.10.*Not affected
  • 5.15.12 through 5.15.*Not affected
  • 5.16 and laterNot affected

References

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