CVE-2023-54197 Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work"
A revert in the Linux kernel Bluetooth driver introduced a null pointer dereference, potentially causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-54197?
CVE-2023-54197 is a vulnerability in Linux, published on 30 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work"
This reverts commit 1e9ac114c4428fdb7ff4635b45d4f46017e8916f.
This patch introduces a possible null-ptr-def problem. Revert it. And the fixed bug by this patch have resolved by commit 73f7b171b7c0 ("Bluetooth: btsdio: fix use after free bug in btsdio_remove due to race condition").
Which versions are affected by CVE-2023-54197?
How do I fix CVE-2023-54197?
Apply the vendor's patch.
Is CVE-2023-54197 being exploited?
There is no known exploitation of CVE-2023-54197 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54197, DEBIAN-CVE-2023-54197, GHSA-pmfg-qjh7-533r, UBUNTU-CVE-2023-54197.