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LinuxCVE-2024-43828

HistoryAug 17, 2024 - 10:15 a.m.

CVE-2024-43828

2024-08-1710:15:08

CWE-835

Linux

web.nvd.nist.gov

linux kernel

ext4

fast_commit

replay

infinite loop

vulnerability

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

6.9

Confidence

High

EPSS

Percentile

5.0%

JSON

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

ext4: fix infinite loop when replaying fast_commit

When doing fast_commit replay an infinite loop may occur due to an
uninitialized extent_status struct. ext4_ext_determine_insert_hole() does
not detect the replay and calls ext4_es_find_extent_range(), which will
return immediately without initializing the ‘es’ variable.

Because ‘es’ contains garbage, an integer overflow may happen causing an
infinite loop in this function, easily reproducible using fstest generic/039.

This commit fixes this issue by unconditionally initializing the structure
in function ext4_es_find_extent_range().

Thanks to Zhang Yi, for figuring out the real problem!

Affected configurations

Nvd

Vulners

Node

linuxlinux_kernelRange5.10–5.10.224

linuxlinux_kernelRange5.11–5.15.165

linuxlinux_kernelRange5.16–6.1.103

linuxlinux_kernelRange6.2–6.6.44

linuxlinux_kernelRange6.7–6.10.3

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/ext4/extents_status.c"
    ],
    "versions": [
      {
        "version": "8016e29f4362",
        "lessThan": "5ed0496e383c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8016e29f4362",
        "lessThan": "0619f7750f2b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8016e29f4362",
        "lessThan": "181e63cd595c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8016e29f4362",
        "lessThan": "c6e67df64783",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8016e29f4362",
        "lessThan": "81f819c537d2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8016e29f4362",
        "lessThan": "907c3fe53225",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/ext4/extents_status.c"
    ],
    "versions": [
      {
        "version": "5.10",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.10",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.224",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.165",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.103",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.44",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.3",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]