CVE-2021-43400

9.1 CRITICAL

Published: November 04, 2021 Modified: November 04, 2025

Description

An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client disconnects during D-Bus processing of a WriteValue call.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8

Source: cve@mitre.org

Mailing List Patch Third Party Advisory

https://lists.debian.org/debian-lts-announce/2022/10/msg00026.html

Source: cve@mitre.org

Mailing List Third Party Advisory

https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List Patch Third Party Advisory

https://lists.debian.org/debian-lts-announce/2022/10/msg00026.html

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List Third Party Advisory

https://lists.debian.org/debian-lts-announce/2024/09/msg00022.html

Source: af854a3a-2127-422b-91ae-364da2661108

5 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.1 / 10.0

EPSS (Exploit Probability)

0.1%

36th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-416

Affected Vendors

bluez debian

Related CVEs