CVE-2024-36891

2024-05-3016:15:12

CWE-476

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

cve-2024-36891

nvd

5.5 Medium

CVSS3

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

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

5.1%

JSON

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

maple_tree: fix mas_empty_area_rev() null pointer dereference

Currently the code calls mas_start() followed by mas_data_end() if the
maple state is MA_START, but mas_start() may return with the maple state
node == NULL. This will lead to a null pointer dereference when checking
information in the NULL node, which is done in mas_data_end().

Avoid setting the offset if there is no node by waiting until after the
maple state is checked for an empty or single entry state.

A user could trigger the events to cause a kernel oops by unmapping all
vmas to produce an empty maple tree, then mapping a vma that would cause
the scenario described above.

Affected configurations

Vulners

NVD

Node

linuxlinux_kernelRange6.1–6.1.94

linuxlinux_kernelRange6.2.0–6.6.31

linuxlinux_kernelRange6.7.0–6.8.10

linuxlinux_kernelRange6.9.0≥

CPENameOperatorVersion
linux:linux_kernellinux linux kernellt6.6.31
linux:linux_kernellinux linux kernellt6.8.10

CPE	Name	Operator	Version
linux:linux_kernel	linux linux kernel	lt	6.6.31
linux:linux_kernel	linux linux kernel	lt	6.8.10

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "lib/maple_tree.c"
    ],
    "versions": [
      {
        "version": "54a611b60590",
        "lessThan": "883e5d542bbd",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "54a611b60590",
        "lessThan": "6c9c7c1e63b1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "54a611b60590",
        "lessThan": "f3956791cf52",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "54a611b60590",
        "lessThan": "955a923d2809",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "lib/maple_tree.c"
    ],
    "versions": [
      {
        "version": "6.1",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.1",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.94",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.31",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.10",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]