What is CVE-2021-43400?

CVE-2021-43400 is a critical-severity vulnerability in Bluez, classified under Use After Free. CVSS score: 9.1/10. Published 2021-11-04.

How severe is CVE-2021-43400?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Use After Free in Bluez

CVE-2021-43400

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.

Vulnerability class: Use-After-Free

EPSS: 0.015 (72.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Bluez — versions 5.61
Debian Debian_linux — versions 10.0
N/a — versions n/a

Weakness classification (CWE)

CWE-416 — Use After Free

References

cve@mitre.org (Patch, Mailing List, Third Party Advisory)
cve@mitre.org (mailing-list, Mailing List, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2021-43400?: CVE-2021-43400 is a critical-severity vulnerability in Bluez, classified under Use After Free. CVSS score: 9.1/10. Published 2021-11-04.
How severe is CVE-2021-43400?: Critical severity. CVSS v3 base score is 9.1 out of 10.