Vulnerability · Published Nov 4, 2021 · Assigned by mitre
CVE-2021-43400
Critical 9.1
In plain English
A critical-severity security flaw in the bluez package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.1Critical
Exploit odds (30 days)1.7%top 23.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | bluez | 5.62-1 | DEBIAN-CVE-2021-43400 |
| Debian:13 | bluez | 5.62-1 | DEBIAN-CVE-2021-43400 |
| Debian:14 | bluez | 5.62-1 | DEBIAN-CVE-2021-43400 |