CVE-2024-0564

2024-01-3015:15:08

CWE-203

redhat

web.nvd.nist.gov

linux

kernel

memory

deduplication

flaw

cve-2024-0564

vulnerability

nvd

CVSS3

6.5

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

5.9

Confidence

High

EPSS

0.001

Percentile

20.7%

JSON

A flaw was found in the Linux kernel’s memory deduplication mechanism. The max page sharing of Kernel Samepage Merging (KSM), added in Linux kernel version 4.4.0-96.119, can create a side channel. When the attacker and the victim share the same host and the default setting of KSM is “max page sharing=256”, it is possible for the attacker to time the unmap to merge with the victim’s page. The unmapping time depends on whether it merges with the victim’s page and additional physical pages are created beyond the KSM’s “max page share”. Through these operations, the attacker can leak the victim’s page.

Affected configurations

Nvd

Node

linuxlinux_kernelRange4.4.0-96.119–5.15.0-58

Node

redhatenterprise_linuxMatch8.0

redhatenterprise_linuxMatch9.0

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
redhatenterprise_linux8.0cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
redhatenterprise_linux9.0cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
redhat	enterprise_linux	8.0	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
redhat	enterprise_linux	9.0	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*

CNA Affected

[
  {
    "versions": [
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.4.0-96.119",
        "versionType": "semver"
      }
    ],
    "packageName": "kernel",
    "collectionURL": "https://git.kernel.org/pub/scm/linux/kernel",
    "defaultStatus": "affected"
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 6",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:6"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel-rt",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel-rt",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "kernel-rt",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9"
    ]
  }
]