CVE-2021-43400
CRITICALCVSS 9.1/10EPSS 1.54%
Last modified
CVE-2021-43400 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 1.54% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Bluez | Bluez | 5.61 |
| Debian | Debian Linux | 10.0 |
References
- https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8Mailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00026.htmlMailing List, Third Party Advisory
- https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8Mailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00026.htmlMailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-43400?
CVE-2021-43400 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.54% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43400?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-43400?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST