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LinuxCVE-2024-42131

HistoryJul 30, 2024 - 8:15 a.m.

CVE-2024-42131

2024-07-3008:15:05

CWE-190

Linux

web.nvd.nist.gov

linux kernel

vulnerability

resolved

overflows

dirty throttling logic

32-bit

page_size

memory hotplug

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.6

Confidence

Low

EPSS

Percentile

5.1%

JSON

In the Linux kernel, the following vulnerability has been resolved:

mm: avoid overflows in dirty throttling logic

The dirty throttling logic is interspersed with assumptions that dirty
limits in PAGE_SIZE units fit into 32-bit (so that various multiplications
fit into 64-bits). If limits end up being larger, we will hit overflows,
possible divisions by 0 etc. Fix these problems by never allowing so
large dirty limits as they have dubious practical value anyway. For
dirty_bytes / dirty_background_bytes interfaces we can just refuse to set
so large limits. For dirty_ratio / dirty_background_ratio it isn’t so
simple as the dirty limit is computed from the amount of available memory
which can change due to memory hotplug etc. So when converting dirty
limits from ratios to numbers of pages, we just don’t allow the result to
exceed UINT_MAX.

This is root-only triggerable problem which occurs when the operator
sets dirty limits to >16 TB.

Affected configurations

Nvd

Vulners

Node

linuxlinux_kernelRange<4.19.320

linuxlinux_kernelRange4.20–5.4.282

linuxlinux_kernelRange5.5–5.10.222

linuxlinux_kernelRange5.11–5.15.163

linuxlinux_kernelRange5.16–6.1.98

linuxlinux_kernelRange6.2–6.6.39

linuxlinux_kernelRange6.7–6.9.9

linuxlinux_kernelMatch6.10rc1

linuxlinux_kernelMatch6.10rc2

linuxlinux_kernelMatch6.10rc3

linuxlinux_kernelMatch6.10rc4

linuxlinux_kernelMatch6.10rc5

linuxlinux_kernelMatch6.10rc6

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel6.10cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*
linuxlinux_kernel6.10cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*
linuxlinux_kernel6.10cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*
linuxlinux_kernel6.10cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*
linuxlinux_kernel6.10cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:*
linuxlinux_kernel6.10cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	6.10	cpe:2.3:o:linux:linux_kernel:6.10:rc1::::::
linux	linux_kernel	6.10	cpe:2.3:o:linux:linux_kernel:6.10:rc2::::::
linux	linux_kernel	6.10	cpe:2.3:o:linux:linux_kernel:6.10:rc3::::::
linux	linux_kernel	6.10	cpe:2.3:o:linux:linux_kernel:6.10:rc4::::::
linux	linux_kernel	6.10	cpe:2.3:o:linux:linux_kernel:6.10:rc5::::::
linux	linux_kernel	6.10	cpe:2.3:o:linux:linux_kernel:6.10:rc6::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "mm/page-writeback.c"
    ],
    "versions": [
      {
        "version": "1da177e4c3f4",
        "lessThan": "2b2d2b8766db",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "4d3817b64eda",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "7a49389771ae",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "a25e85361845",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "c83ed422c24f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "bd16a7ee339a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "8e0b5e7f2895",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "385d838df280",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "mm/page-writeback.c"
    ],
    "versions": [
      {
        "version": "4.19.320",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.282",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.222",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.163",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.98",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.39",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.9",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]