CVE-2024-35939

dma-direct: Leak pages on dma_set_decrypted() failure

State: Published
Severity: 9.3 Critical
Published: May 19, 2024
Updated: Aug 5, 2026
Reserved: May 17, 2024

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.

Scores

CVSS	Score	Vector	Source
3.1	9.3 Critical	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	56fccf21d1961a06e2a0c96ce446ebf036651062 to before 4e0cfb25d49da2e6261ad582f58ffa5b5dd8c8e9Affected 56fccf21d1961a06e2a0c96ce446ebf036651062 to before 4031b72ca747a1e6e9ae4fa729e765b43363d66aAffected 56fccf21d1961a06e2a0c96ce446ebf036651062 to before b57326c96b7bc7638aa8c44e12afa2defe0c934cAffected 56fccf21d1961a06e2a0c96ce446ebf036651062 to before b9fa16949d18e06bdf728a560f5c8af56d2bdcafAffected 91c7b0407ca6a62c095d265f76926b67bf66c026Affected 5.7.7 to before 5.8Affected
LinuxLinux	5.8Affected before 5.8Not affected 6.1.86 through 6.1.Not affected 6.6.27 through 6.6.Not affected 6.8.6 through 6.8.*Not affected 6.9 and laterNot affected

Product

Versions

LinuxLinux

56fccf21d1961a06e2a0c96ce446ebf036651062 to before 4e0cfb25d49da2e6261ad582f58ffa5b5dd8c8e9Affected
56fccf21d1961a06e2a0c96ce446ebf036651062 to before 4031b72ca747a1e6e9ae4fa729e765b43363d66aAffected
56fccf21d1961a06e2a0c96ce446ebf036651062 to before b57326c96b7bc7638aa8c44e12afa2defe0c934cAffected
56fccf21d1961a06e2a0c96ce446ebf036651062 to before b9fa16949d18e06bdf728a560f5c8af56d2bdcafAffected
91c7b0407ca6a62c095d265f76926b67bf66c026Affected
5.7.7 to before 5.8Affected

LinuxLinux

5.8Affected
before 5.8Not affected
6.1.86 through 6.1.*Not affected
6.6.27 through 6.6.*Not affected
6.8.6 through 6.8.*Not affected
6.9 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.