CVE-2024-50115

HIGH EPSS 15.3%
Published Nov 5, 20241y ago · Modified Jun 17, 20261w ago
7.1 CVSS 3.1
High
Find Similar
Published Nov 5, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
7.1
Exploitability
1.8
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
15.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥3.2  –  <5.10.229
linuxlinux_kernel*≥5.11  –  <5.15.170
linuxlinux_kernel*≥5.16  –  <6.1.115
linuxlinux_kernel*≥6.2  –  <6.6.59
linuxlinux_kernel*≥6.7  –  <6.11.6
linuxlinux_kernel6.12any
linuxlinux_kernel6.12any
linuxlinux_kernel6.12any
linuxlinux_kernel6.12any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/2c4adc9b192a0815fe58a62bc0709449416cc884
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/426682afec71ea3f889b972d038238807b9443e4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/58cb697d80e669c56197f703e188867c8c54c494
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6876793907cbe19d42e9edc8c3315a21e06c32ae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/76ce386feb14ec9a460784fcd495d8432acce7a5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f559b2e9c5c5308850544ab59396b7d53cfc67bd
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2c4adc9b192a0815fe58a62bc0709449416cc884
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/426682afec71ea3f889b972d038238807b9443e4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/58cb697d80e669c56197f703e188867c8c54c494
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6876793907cbe19d42e9edc8c3315a21e06c32ae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/76ce386feb14ec9a460784fcd495d8432acce7a5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f559b2e9c5c5308850544ab59396b7d53cfc67bd
    Patch