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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. Reference: https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq
Created bluez tracking bugs for this issue: Affects: fedora-all [bug 2025035]
All versions of RHEL are affected by this flaw. This is low in impact however so flaw remediation will be delegated for supported releases. The flaw was caused by unfreed memory of a linked list which led to a memory leak. This could become very large which could result in the service crashing due to this flaw. A patch has been applied by ubuntu for all bluez packages and link provided below: Patch: https://git.launchpad.net/ubuntu/+source/bluez/diff/debian/patches/CVE-2021-41229.patch?h=applied/ubuntu/hirsute-security
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2022:2081 https://access.redhat.com/errata/RHSA-2022:2081
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-41229