CVE-2021-47258

Summary

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

scsi: core: Fix error handling of scsi_host_alloc()

After device is initialized via device_initialize(), or its name is set via dev_set_name(), the device has to be freed via put_device(). Otherwise device name will be leaked because it is allocated dynamically in dev_set_name().

Fix the leak by replacing kfree() with put_device(). Since scsi_host_dev_release() properly handles IDA and kthread removal, remove special-casing these from the error handling as well.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1fa5ae857bb14f6046205171d98506d8112dd74e < 8958181c1663e24a13434448e7d6b96b5d04900aaffected
LinuxLinux1fa5ae857bb14f6046205171d98506d8112dd74e < db08ce595dd64ea9859f7d088b51cbfc8e685c66affected
LinuxLinux1fa5ae857bb14f6046205171d98506d8112dd74e < 2dc85045ae65b9302a1d2e2ddd7ce4c030153a6aaffected
LinuxLinux1fa5ae857bb14f6046205171d98506d8112dd74e < 79296e292d67fa7b5fb8d8c27343683e823872c8affected
LinuxLinux1fa5ae857bb14f6046205171d98506d8112dd74e < 7a696ce1d5d16a33a6cd6400bbcc0339b2460e11affected
LinuxLinux1fa5ae857bb14f6046205171d98506d8112dd74e < 45d83db4728127944b237c0c8248987df9d478e7affected
LinuxLinux1fa5ae857bb14f6046205171d98506d8112dd74e < 66a834d092930cf41d809c0e989b13cd6f9ca006affected
LinuxLinux2.6.30affected
LinuxLinux0 < 2.6.30unaffected
LinuxLinux4.9.273 <= 4.9.*unaffected
LinuxLinux4.14.237 <= 4.14.*unaffected
LinuxLinux4.19.195 <= 4.19.*unaffected
LinuxLinux5.4.126 <= 5.4.*unaffected
LinuxLinux5.10.44 <= 5.10.*unaffected
LinuxLinux5.12.11 <= 5.12.*unaffected
LinuxLinux5.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References