CVE-2022-49076

Summary

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

RDMA/hfi1: Fix use-after-free bug for mm struct

Under certain conditions, such as MPI_Abort, the hfi1 cleanup code may represent the last reference held on the task mm. hfi1_mmu_rb_unregister() then drops the last reference and the mm is freed before the final use in hfi1_release_user_pages(). A new task may allocate the mm structure while it is still being used, resulting in problems. One manifestation is corruption of the mmap_sem counter leading to a hang in down_write(). Another is corruption of an mm struct that is in use by another task.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3d2a9d642512c21a12d19b9250e7a835dcb41a79 < 5f54364ff6cfcd14cddf5441c4a490bb28dd69f7affected
LinuxLinux3d2a9d642512c21a12d19b9250e7a835dcb41a79 < 9ca11bd8222a612de0d2f54d050bfcf61ae2883faffected
LinuxLinux3d2a9d642512c21a12d19b9250e7a835dcb41a79 < 0b7186d657ee55e2cdefae498f07d5c1961e8023affected
LinuxLinux3d2a9d642512c21a12d19b9250e7a835dcb41a79 < 5a9a1b24ddb510715f8f621263938186579a965caffected
LinuxLinux3d2a9d642512c21a12d19b9250e7a835dcb41a79 < 2bbac98d0930e8161b1957dc0ec99de39ade1b3caffected
LinuxLinux5732f83596f8a573f2cde814cc76a54e1a8995c7affected
LinuxLinux5.9.12 < 5.10affected
LinuxLinux5.10affected
LinuxLinux0 < 5.10unaffected
LinuxLinux5.10.111 <= 5.10.*unaffected
LinuxLinux5.15.34 <= 5.15.*unaffected
LinuxLinux5.16.20 <= 5.16.*unaffected
LinuxLinux5.17.3 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References