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CVE Record

CVE-2024-57793: virt: tdx-guest: Just leak decrypted memory on unrecoverable errors

In the Linux kernel, the following vulnerability has been resolved: virt: tdx-guest: Just leak decrypted memory on unrecoverable errors In CoCo VMs it is possible for the untrusted host to cause 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. Leak the decrypted memory when set_memory_decrypted() fails, and don't need to print an error since set_memory_decrypted() will call WARN_ONCE().

CriticalCVSS 9.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A malicious or compromised host can trigger an error in a Linux confidential-computing guest, leaving memory shared with the host. If that memory returns to the normal allocator, later data could be exposed or corrupted. The kernel fix keeps the affected memory from being reused.

Executive priority

Treat this as urgent for organizations using Linux TDX confidential VMs, especially where sensitive workloads rely on isolation from infrastructure operators. Prioritize inventory and vendor-backed kernel updates. For organizations without TDX guests, confirm that absence and track normally rather than assuming broad Linux exposure.

Technical view

In Linux TDX guests, an untrusted host can cause set_memory_decrypted() to fail while the page remains decrypted and shared. Returning that page to the allocator could create confidentiality, integrity, availability, or functional problems. The resolution deliberately leaks the page after an unrecoverable failure rather than allowing reuse.

Likely exposure

Exposure appears limited to affected Linux kernels running TDX confidential-computing guests. The supplied record identifies versions 6.7, 6.12.8, and 6.13 as affected, but its version data is ambiguous. Ordinary Linux systems outside this configuration are not shown as affected.

Exploitation context

The CVSS vector describes local, low-complexity exploitation without privileges or user interaction, with impact crossing a security boundary. The hostile party is the untrusted host controlling a confidential VM. The record is not in KEV, and the supplied sources provide no evidence of active exploitation or a public exploit.

Researcher notes

The security consequence is allocator reuse of a page that unexpectedly remains shared after a failed encryption-state transition. The patch changes failure handling to retain that page permanently. The bundle provides no CWE, exploit evidence, affected architecture details beyond TDX guests, or definitive fixed release numbers; downstream backport status requires vendor confirmation.

Mitigation direction

  • Inventory Linux confidential-computing guests and identify those using Intel TDX.
  • Check distribution advisories for a kernel package incorporating one of the cited stable fixes.
  • Update affected guest kernels using vendor-supported packages and normal change-control procedures.
  • Prioritize sensitive TDX workloads where the host is outside the guest's trust boundary.

Validation and detection

  • Record each TDX guest's running kernel version and distribution package revision.
  • Confirm the installed package includes a backport of either cited kernel commit.
  • Reboot updated guests when required and verify they are running the corrected kernel.
  • Review vendor advisories because the supplied affected-version metadata is incomplete and ambiguous.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-57793 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.3CVSS 3.1CriticalCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H2.56Linux

Vulnerability scoring details

Base CVSS 3.1 score

9.3Critical
CVSS 3.1 vector shape for CVE-2024-57793Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxf4738f56d1dc62aaba69b33702a5ab098f1b8c63, f4738f56d1dc62aaba69b33702a5ab098f1b8c63unaffected
LinuxLinux6.7, 0, 6.12.8, 6.13affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.