CVE-2021-41229

BlueZ is a Bluetooth protocol stack for Linux. In affected versions a vulnerability exists in sdp_cstate_alloc_buf which allocates memory which will always be hung in the singly linked list of cstates and will not be freed. This will cause a memory leak over time. The data can be a very large object, which can be caused by an attacker continuously sending sdp packets and this may cause the service of the target device to crash.

• CWE-400
• CWE-401

• https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xqExploit, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/11/msg00022.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/10/msg00026.htmlMailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211203-0004/Third Party Advisory
• https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xqExploit, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/11/msg00022.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/10/msg00026.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2024/09/msg00022.html
• https://security.netapp.com/advisory/ntap-20211203-0004/Third Party Advisory

Published

Nov 12, 2021

Last Modified

Jun 17, 2026

Status

Modified

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