CVE-2021-47113

Summary

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

btrfs: abort in rename_exchange if we fail to insert the second ref

Error injection stress uncovered a problem where we'd leave a dangling inode ref if we failed during a rename_exchange. This happens because we insert the inode ref for one side of the rename, and then for the other side. If this second inode ref insert fails we'll leave the first one dangling and leave a corrupt file system behind. Fix this by aborting if we did the insert for the first inode ref.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxcdd1fedf8261cd7a73c0596298902ff4f0f04492 < 0df50d47d17401f9f140dfbe752a65e5d72f9932affected
LinuxLinuxcdd1fedf8261cd7a73c0596298902ff4f0f04492 < ff8de2cec65a8c8521faade12a31b39c80e49f5baffected
LinuxLinuxcdd1fedf8261cd7a73c0596298902ff4f0f04492 < dc09ef3562726cd520c8338c1640872a60187af5affected
LinuxLinux4.7affected
LinuxLinux0 < 4.7unaffected
LinuxLinux5.10.43 <= 5.10.*unaffected
LinuxLinux5.12.10 <= 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