dma-direct: Leak pages on dma_set_decrypted() failure
At a glance
Severity
CRITICAL 9.3
EPSS
EPSS 0.22 % · percentile 13 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified
Description
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.
