CVE-2024-36910

Summary

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

uio_hv_generic: Don't free decrypted memory

In CoCo VMs it is possible for the untrusted host to cause set_memory_encrypted() or set_memory_decrypted() to fail such that an error is returned and the resulting memory is shared. Callers need to take care to handle these errors to avoid returning decrypted (shared) memory to the page allocator, which could lead to functional or security issues.

The VMBus device UIO driver could free decrypted/shared pages if set_memory_decrypted() fails. Check the decrypted field in the gpadl to decide whether to free the memory.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd4dccf353db80e209f262e3973c834e6e48ba9a9 < dabf12bf994318d939f70d47cfda30e47abb2c54affected
LinuxLinuxd4dccf353db80e209f262e3973c834e6e48ba9a9 < 6466a0f6d235c8a18c602cb587160d7e49876db9affected
LinuxLinuxd4dccf353db80e209f262e3973c834e6e48ba9a9 < fe2c58602354fbd60680dc42ac3a0b772cda7d23affected
LinuxLinuxd4dccf353db80e209f262e3973c834e6e48ba9a9 < 3d788b2fbe6a1a1a9e3db09742b90809d51638b7affected
LinuxLinux5.16affected
LinuxLinux0 < 5.16unaffected
LinuxLinux6.1.91 <= 6.1.*unaffected
LinuxLinux6.6.31 <= 6.6.*unaffected
LinuxLinux6.8.10 <= 6.8.*unaffected
LinuxLinux6.9 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References