CVE-2022-50391

Summary

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

mm/mempolicy: fix memory leak in set_mempolicy_home_node system call

When encountering any vma in the range with policy other than MPOL_BIND or MPOL_PREFERRED_MANY, an error is returned without issuing a mpol_put on the policy just allocated with mpol_dup().

This allows arbitrary users to leak kernel memory.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc6018b4b254971863bd0ad36bb5e7d0fa0f0ddb0 < 4ca0eb6b2f3add8c5daefb726ce57dc95d103d33affected
LinuxLinuxc6018b4b254971863bd0ad36bb5e7d0fa0f0ddb0 < 0ce4cc6d269ddc448a825955b495f662f5d9e153affected
LinuxLinuxc6018b4b254971863bd0ad36bb5e7d0fa0f0ddb0 < 38ce7c9bdfc228c14d7621ba36d3eebedd9d4f76affected
LinuxLinux5.17affected
LinuxLinux0 < 5.17unaffected
LinuxLinux6.0.17 <= 6.0.*unaffected
LinuxLinux6.1.3 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References