Critical severity · published Nov 4, 2021
CVE-2021-43400
An issue was discovered in gatt-database.c in BlueZ 5.61
9.1
CVSS
1.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BL
Bluez · Bluez
5.61 · source: NVD
DL
Debian Linux · Debian
10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43400
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43400
Mailing List
https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8
Mailing List
https://lists.debian.org/debian-lts-announce/2022/10/msg00026.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2024/09/msg00022.html
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