CVE-2021-46923

Summary

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

fs/mount_setattr: always cleanup mount_kattr

Make sure that finish_mount_kattr() is called after mount_kattr was succesfully built in both the success and failure case to prevent leaking any references we took when we built it. We returned early if path lookup failed thereby risking to leak an additional reference we took when building mount_kattr when an idmapped mount was requested.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9caccd41541a6f7d6279928d9f971f6642c361af < 47b5d0a7532d39e42a938f81e3904268145c341daffected
LinuxLinux9caccd41541a6f7d6279928d9f971f6642c361af < 012e332286e2bb9f6ac77d195f17e74b2963d663affected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux5.15.13 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References