CVE-2024-50115

Advisory lineage Upstream: 0 Downstream: 91
Modified
Published: 05 Nov 2024, 17:10
Last modified:11 May 2026, 20:45

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
7.1 HIGH
v3.1 (cve.org)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

05 Nov 2024, 17:10
Published
Vulnerability first disclosed
11 May 2026, 20:45
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory Ignore nCR3[4:0] when loading PDPTEs from memory for nested SVM, as bits 4:0 of CR3 are ignored when PAE paging is used, and thus VMRUN doesn't enforce 32-byte alignment of nCR3. In the absolute worst case scenario, failure to ignore bits 4:0 can result in an out-of-bounds read, e.g. if the target page is at the end of a memslot, and the VMM isn't using guard pages. Per the APM: The CR3 register points to the base address of the page-directory-pointer table. The page-directory-pointer table is aligned on a 32-byte boundary, with the low 5 address bits 4:0 assumed to be 0. And the SDM's much more explicit: 4:0 Ignored Note, KVM gets this right when loading PDPTRs, it's only the nSVM flow that is broken.

CVSS Metrics

  • v3.1•HIGH•Score: 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 3%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • linux•linux

    ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < 76ce386feb14ec9a460784fcd495d8432acce7a5 | ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < 58cb697d80e669c56197f703e188867c8c54c494 | ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < 6876793907cbe19d42e9edc8c3315a21e06c32ae | ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < 2c4adc9b192a0815fe58a62bc0709449416cc884 | ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < 426682afec71ea3f889b972d038238807b9443e4 | ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < f559b2e9c5c5308850544ab59396b7d53cfc67bd | 3.2

  • linux•linux_kernel

    ≥ 3.2, < 5.10.229 | ≥ 5.11, < 5.15.170 | ≥ 5.16, < 6.1.115 | ≥ 6.2, < 6.6.59 | ≥ 6.7, < 6.11.6 | 6.12:rc1 | 6.12:rc2 | 6.12:rc3 | 6.12:rc4

References (8)