A use-after-free flaw was found in the Linux kernel’s Bluetooth subsystem in the way user calls connect to the socket and disconnect simultaneously due to a race condition. This flaw allows a user to crash the system or escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Published 2022-02-16 19:15:09
Updated 2023-11-09 14:44:34
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: Memory Corruption

Threat overview for CVE-2021-3752

Top countries where our scanners detected CVE-2021-3752
Top open port discovered on systems with this issue 53
IPs affected by CVE-2021-3752 693,167
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-3752!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-3752

Probability of exploitation activity in the next 30 days: 0.12%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 46 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-3752

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
7.9
HIGH AV:A/AC:M/Au:N/C:C/I:C/A:C
5.5
10.0
NIST
7.1
HIGH CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
1.2
5.9
NIST

CWE ids for CVE-2021-3752

  • The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.
    Assigned by: nvd@nist.gov (Primary)
  • Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
    Assigned by:
    • nvd@nist.gov (Primary)
    • secalert@redhat.com (Secondary)

References for CVE-2021-3752

Products affected by CVE-2021-3752

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