CVE-2023-52576

Summary

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

x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer()

The code calling ima_free_kexec_buffer() runs long after the memblock allocator has already been torn down, potentially resulting in a use after free in memblock_isolate_range().

With KASAN or KFENCE, this use after free will result in a BUG from the idle task, and a subsequent kernel panic.

Switch ima_free_kexec_buffer() over to memblock_free_late() to avoid that bug.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxfee3ff99bc67604fba77f19da0106f3ec52b1956 < eef16bfdb212da60f5144689f2967fb25b051a2baffected
LinuxLinuxfee3ff99bc67604fba77f19da0106f3ec52b1956 < d2dfbc0e3b7a04c2d941421a958dc31c897fb204affected
LinuxLinuxfee3ff99bc67604fba77f19da0106f3ec52b1956 < 34cf99c250d5cd2530b93a57b0de31d3aaf8685baffected
LinuxLinux5.13affected
LinuxLinux0 < 5.13unaffected
LinuxLinux6.1.56 <= 6.1.*unaffected
LinuxLinux6.5.6 <= 6.5.*unaffected
LinuxLinux6.6 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References