CVE-2022-49053

Summary

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

scsi: target: tcmu: Fix possible page UAF

tcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not take refcount properly and just returns page pointer. When tcmu_try_get_data_page() returns, the returned page may have been freed by tcmu_blocks_release().

We need to get_page() under cmdr_lock to avoid concurrent tcmu_blocks_release().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux141685a39151aea95eb56562d2953e919c6c73da < d7c5d79e50be6e06b669141e3db1f977a0dd4e8eaffected
LinuxLinux141685a39151aea95eb56562d2953e919c6c73da < e3e0e067d5b34e4a68e3cc55f8eebc413f56f8edaffected
LinuxLinux141685a39151aea95eb56562d2953e919c6c73da < fb7a5115422fbd6a4d505e8844f1ef5529f10489affected
LinuxLinux141685a39151aea95eb56562d2953e919c6c73da < aec36b98a1bbaa84bfd8299a306e4c12314af626affected
LinuxLinux141685a39151aea95eb56562d2953e919c6c73da < b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322affected
LinuxLinux141685a39151aea95eb56562d2953e919c6c73da < a9564d84ed9f6ee71017d062d0d2182154294a4baffected
LinuxLinux141685a39151aea95eb56562d2953e919c6c73da < a6968f7a367f128d120447360734344d5a3d5336affected
LinuxLinux4.12affected
LinuxLinux0 < 4.12unaffected
LinuxLinux4.14.276 <= 4.14.*unaffected
LinuxLinux4.19.239 <= 4.19.*unaffected
LinuxLinux5.4.190 <= 5.4.*unaffected
LinuxLinux5.10.112 <= 5.10.*unaffected
LinuxLinux5.15.35 <= 5.15.*unaffected
LinuxLinux5.17.4 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References