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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.017 (75.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Bluez — versions 5.61
- Debian Linux — versions 10.0
Weakness classification (CWE)
References
- git.kernel.org/pub/scm/bluetooth/bluez.git/commit/ (Patch, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/10/msg00026.html (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.