CVE-2022-49388

Summary

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

ubi: ubi_create_volume: Fix use-after-free when volume creation failed

There is an use-after-free problem for 'eba_tbl' in ubi_create_volume()'s error handling path:

ubi_eba_replace_table(vol, eba_tbl) vol->eba_tbl = tbl out_mapping: ubi_eba_destroy_table(eba_tbl) // Free 'eba_tbl' out_unlock: put_device(&vol->dev) vol_release kfree(tbl->entries) // UAF

Fix it by removing redundant 'eba_tbl' releasing. Fetch a reproducer in [Link].

Affected Software

VendorProductVersion RangeStatus
LinuxLinux493cfaeaa0c9bc0c79ce5751193d49fdac9aaaec < 25ff1e3a1351c0d936dd1ac2f9e58231ea1510c9affected
LinuxLinux493cfaeaa0c9bc0c79ce5751193d49fdac9aaaec < abb67043060f2bf4c03d7c3debb9ae980e2b6db3affected
LinuxLinux493cfaeaa0c9bc0c79ce5751193d49fdac9aaaec < 8302620aeb940f386817321d272b12411ae7d39faffected
LinuxLinux493cfaeaa0c9bc0c79ce5751193d49fdac9aaaec < 6d8d3f68cbecfd31925796f0fb668eb21ab06734affected
LinuxLinux493cfaeaa0c9bc0c79ce5751193d49fdac9aaaec < 5ff2514e4fb55dcf3d88294686040ca73ea0c1a2affected
LinuxLinux493cfaeaa0c9bc0c79ce5751193d49fdac9aaaec < e27ecf325e51abd06aaefba57a6322a46fa4178baffected
LinuxLinux493cfaeaa0c9bc0c79ce5751193d49fdac9aaaec < 1174ab8ba36a48025b68b5ff1085000b1e510217affected
LinuxLinux493cfaeaa0c9bc0c79ce5751193d49fdac9aaaec < 8c03a1c21d72210f81cb369cc528e3fde4b45411affected
LinuxLinux4.12affected
LinuxLinux0 < 4.12unaffected
LinuxLinux4.14.283 <= 4.14.*unaffected
LinuxLinux4.19.247 <= 4.19.*unaffected
LinuxLinux5.4.198 <= 5.4.*unaffected
LinuxLinux5.10.122 <= 5.10.*unaffected
LinuxLinux5.15.47 <= 5.15.*unaffected
LinuxLinux5.17.15 <= 5.17.*unaffected
LinuxLinux5.18.4 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References