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cvelistZdiCVELIST:CVE-2021-34981
HistoryMay 07, 2024 - 10:54 p.m.

CVE-2021-34981 Linux Kernel Bluetooth CMTP Module Double Free Privilege Escalation Vulnerability

2024-05-0722:54:49
CWE-415
zdi
www.cve.org
linux kernel bluetooth cmtp module
double free
privilege escalation
local attackers
high-privileged code
cve-2021-34981
zdi-can-11977

7.5 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

7.5 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

28.9%

Linux Kernel Bluetooth CMTP Module Double Free Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the CMTP module. The issue results from the lack of validating the existence of an object prior to performing further free operations on the object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel. Was ZDI-CAN-11977.

CNA Affected

[
  {
    "vendor": "Linux",
    "product": "Kernel",
    "versions": [
      {
        "version": "4.15.0-118-generic",
        "status": "affected"
      }
    ],
    "defaultStatus": "unknown"
  }
]

7.5 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

7.5 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

28.9%