CVE-2024-35939

Summary

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

dma-direct: Leak pages on dma_set_decrypted() failure

On TDX 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.

DMA could free decrypted/shared pages if dma_set_decrypted() fails. This should be a rare case. Just leak the pages in this case instead of freeing them.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux56fccf21d1961a06e2a0c96ce446ebf036651062 < 4e0cfb25d49da2e6261ad582f58ffa5b5dd8c8e9affected
LinuxLinux56fccf21d1961a06e2a0c96ce446ebf036651062 < 4031b72ca747a1e6e9ae4fa729e765b43363d66aaffected
LinuxLinux56fccf21d1961a06e2a0c96ce446ebf036651062 < b57326c96b7bc7638aa8c44e12afa2defe0c934caffected
LinuxLinux56fccf21d1961a06e2a0c96ce446ebf036651062 < b9fa16949d18e06bdf728a560f5c8af56d2bdcafaffected
LinuxLinux91c7b0407ca6a62c095d265f76926b67bf66c026affected
LinuxLinux5.7.7 < 5.8affected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux6.1.86 <= 6.1.*unaffected
LinuxLinux6.6.27 <= 6.6.*unaffected
LinuxLinux6.8.6 <= 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