CVE-2021-47058

Summary

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

regmap: set debugfs_name to NULL after it is freed

There is a upstream commit cffa4b2122f5("regmap:debugfs: Fix a memory leak when calling regmap_attach_dev") that adds a if condition when create name for debugfs_name. With below function invoking logical, debugfs_name is freed in regmap_debugfs_exit(), but it is not created again because of the if condition introduced by above commit. regmap_reinit_cache() regmap_debugfs_exit() … regmap_debugfs_init() So, set debugfs_name to NULL after it is freed.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5b654b03007917f3f1015b2a5c288c1ea6ae8f65 < 2dc1554d5f0fdaf47cc5bea442b84b9226fea867affected
LinuxLinux480c5e9c7e4c76c01d5f1f7b73832d7b77e6b427 < d8897f7b2283a500666c85ef06e820df38ed7b52affected
LinuxLinuxc9698380b01aed3281160d3ab25749b57d6913b8 < eb949f891226c012138ffd9df90d1e509f428ae6affected
LinuxLinuxcffa4b2122f5f3e53cf3d529bbc74651f95856d5 < c764e375ae647832de1ee73d43a4bb3ef8a8f43daffected
LinuxLinuxcffa4b2122f5f3e53cf3d529bbc74651f95856d5 < b9e569ae1da3a113b3acee8703c94777fd20938aaffected
LinuxLinuxcffa4b2122f5f3e53cf3d529bbc74651f95856d5 < e41a962f82e7afb5b1ee644f48ad0b3aee656268affected
LinuxLinux4.19.168 < 4.19.191affected
LinuxLinux5.4.90 < 5.4.119affected
LinuxLinux5.10.8 < 5.10.37affected
LinuxLinux5.11affected
LinuxLinux0 < 5.11unaffected
LinuxLinux4.19.191 <= 4.19.*unaffected
LinuxLinux5.4.119 <= 5.4.*unaffected
LinuxLinux5.10.37 <= 5.10.*unaffected
LinuxLinux5.11.21 <= 5.11.*unaffected
LinuxLinux5.12.4 <= 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