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CVE-2024-46794— x86/tdx: Fix data leak in mmio_read()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞。攻击者利用该漏洞可以获取敏感信息。

AI Predicted 4.4 Difficulty: Theoretical EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 31d58c4e557d46fa7f8557714250fb6f89c941ae< 26c6af49d26ffc377e392e30d4086db19eed0ef7 affected
31d58c4e557d46fa7f8557714250fb6f89c941ae< ef00818c50cf55a3a56bd9a9fae867c92dfb84e7 affected
31d58c4e557d46fa7f8557714250fb6f89c941ae< b55ce742afcb8e8189d82f2f1e635ba1b5a461fa affected
31d58c4e557d46fa7f8557714250fb6f89c941ae< b6fb565a2d15277896583d471b21bc14a0c99661 affected
5.19 affected
< 5.19 unaffected
6.1.110≤ 6.1.* unaffected
6.6.51≤ 6.6.* unaffected
… +2 more rows
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I. Basic Information for CVE-2024-46794

Vulnerability Information
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Vulnerability Title
x86/tdx: Fix data leak in mmio_read()
Source: CVE Program / CVE List V5
Vulnerability 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. ]
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞。攻击者利用该漏洞可以获取敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 31d58c4e557d46fa7f8557714250fb6f89c941ae ~ 26c6af49d26ffc377e392e30d4086db19eed0ef7 -
Linux Linux 5.19 -

II. Public POCs for CVE-2024-46794

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III. Intelligence Information for CVE-2024-46794

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Patches & Fixes for CVE-2024-46794 (3)

Same Patch Batch · Linux · 2024-09-18 · 85 CVEs total

CVE-2024-46717 9.8 CRITICAL net/mlx5e: SHAMPO, Fix incorrect page release
CVE-2024-46736 9.8 CRITICAL smb: client: fix double put of @cfile in smb2_rename_path()
CVE-2024-46796 9.8 CRITICAL smb: client: fix double put of @cfile in smb2_set_path_size()
CVE-2024-46755 8.8 HIGH wifi: mwifiex: Do not return unused priv in mwifiex_get_priv_by_id()
CVE-2024-46750 7.8 HIGH PCI: Add missing bridge lock to pci_bus_lock()
CVE-2024-46787 7.8 HIGH userfaultfd: fix checks for huge PMDs
CVE-2024-46716 7.8 HIGH dmaengine: altera-msgdma: properly free descriptor in msgdma_free_descriptor
CVE-2024-46734 7.8 HIGH btrfs: fix race between direct IO write and fsync when using same fd
CVE-2024-46738 7.8 HIGH VMCI: Fix use-after-free when removing resource in vmci_resource_remove()
CVE-2024-46740 7.8 HIGH binder: fix UAF caused by offsets overwrite
CVE-2024-46781 7.8 HIGH nilfs2: fix missing cleanup on rollforward recovery error
CVE-2024-46746 7.8 HIGH HID: amd_sfh: free driver_data after destroying hid device
CVE-2024-46780 7.8 HIGH nilfs2: protect references to superblock parameters exposed in sysfs
CVE-2024-46741 7.8 HIGH misc: fastrpc: Fix double free of 'buf' in error path
CVE-2024-46751 7.8 HIGH btrfs: don't BUG_ON() when 0 reference count at btrfs_lookup_extent_info()
CVE-2024-46777 7.8 HIGH udf: Avoid excessive partition lengths
CVE-2024-46754 7.8 HIGH bpf: Remove tst_run from lwt_seg6local_prog_ops.
CVE-2024-46762 7.8 HIGH xen: privcmd: Fix possible access to a freed kirqfd instance
CVE-2024-46765 7.8 HIGH ice: protect XDP configuration with a mutex
CVE-2024-46771 7.8 HIGH can: bcm: Remove proc entry when dev is unregistered.

Showing top 20 of 85 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-46794

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