by Kastro CVE-2024-35939
Linux Linux — dma-direct: Leak pages on dma_set_decrypted() failure
Description · from the CVE record
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
ProductAffectedFixed inSource
Linux56fccf21d1961a06e2a0c96ce446ebf036651062 – < 4e0cfb25d49da2e6261ad582f58ffa5b5dd8c8e94e0cfb25d49da2e6261ad582f58ffa5b5dd8c8e9CNA
Linux56fccf21d1961a06e2a0c96ce446ebf036651062 – < 4031b72ca747a1e6e9ae4fa729e765b43363d66a4031b72ca747a1e6e9ae4fa729e765b43363d66aCNA
Linux56fccf21d1961a06e2a0c96ce446ebf036651062 – < b57326c96b7bc7638aa8c44e12afa2defe0c934cb57326c96b7bc7638aa8c44e12afa2defe0c934cCNA
Linux56fccf21d1961a06e2a0c96ce446ebf036651062 – < b9fa16949d18e06bdf728a560f5c8af56d2bdcafb9fa16949d18e06bdf728a560f5c8af56d2bdcafCNA
Linux91c7b0407ca6a62c095d265f76926b67bf66c026–CNA
Linux5.7.7 – < 5.85.8CNA
Linux5.8–CNA
Scores by source
Linux (CNA)9.3CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial