CVE-2024-46794
Linux Kernel TDX x86 Memory Leak
Description
In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix data leak in mmio_read() The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an address from the VMM. Sean noticed that mmio_read() unintentionally exposes the value of an initialized variable (val) on the stack to the VMM. This variable is only needed as an output value. It did not need to be passed to the VMM in the first place. Do not send the original value of *val to the VMM. [ dhansen: clarify what 'val' is used for. ]
INFO
Published Date :
Sept. 18, 2024, 8:15 a.m.
Last Modified :
Nov. 20, 2024, 8:56 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
1.4
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-46794.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-46794 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-46794 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Nov. 20, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Changed Reference Type https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7 No Types Assigned https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7 Patch Changed Reference Type https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461fa No Types Assigned https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461fa Patch Changed Reference Type https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661 No Types Assigned https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661 Patch Changed Reference Type https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7 No Types Assigned https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7 Patch Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (including) 5.19 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.1 up to (excluding) 6.1.110 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6 up to (excluding) 6.6.51 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.10 up to (excluding) 6.10.10 *cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:* -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 18, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix data leak in mmio_read() The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an address from the VMM. Sean noticed that mmio_read() unintentionally exposes the value of an initialized variable (val) on the stack to the VMM. This variable is only needed as an output value. It did not need to be passed to the VMM in the first place. Do not send the original value of *val to the VMM. [ dhansen: clarify what 'val' is used for. ] Added Reference kernel.org https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461fa [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-46794 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-46794
weaknesses.