CVE-2022-48829

Summary

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

NFSD: Fix NFSv3 SETATTR/CREATE's handling of large file sizes

iattr::ia_size is a loff_t, so these NFSv3 procedures must be careful to deal with incoming client size values that are larger than s64_max without corrupting the value.

Silently capping the value results in storing a different value than the client passed in which is unexpected behavior, so remove the min_t() check in decode_sattr3().

Note that RFC 1813 permits only the WRITE procedure to return NFS3ERR_FBIG. We believe that NFSv3 reference implementations also return NFS3ERR_FBIG when ia_size is too large.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 72c14aed6838b5d90b4dd926b6a339b34bb02e08affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a231ae6bb50e7c0a9e9efd7b0d10687f1d71b3a3affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 37f2d2cd8eadddbbd9c7bda327a9393399b2f89baffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < aa9051ddb4b378bd22e72a67bc77b9fc1482c5f0affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a648fdeb7c0e17177a2280344d015dba3fbe3314affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux5.4.295 <= 5.4.*unaffected
LinuxLinux5.10.220 <= 5.10.*unaffected
LinuxLinux5.15.24 <= 5.15.*unaffected
LinuxLinux5.16.10 <= 5.16.*unaffected
LinuxLinux5.17 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

Additional References

References