CVE-2023-54100 scsi: qedi: Fix use after free bug in qedi_remove()
A use-after-free vulnerability in the Linux kernel qedi driver allows attackers to cause a denial of service or potentially execute code during driver removal.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-54100?
CVE-2023-54100 is a high-severity use after free vulnerability in Linux, published on 24 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:
scsi: qedi: Fix use after free bug in qedi_remove()
In qedi_probe() we call __qedi_probe() which initializes &qedi->recovery_work with qedi_recovery_handler() and &qedi->board_disable_work with qedi_board_disable_work().
When qedi_schedule_recovery_handler() is called, schedule_delayed_work() will finally start the work.
In qedi_remove(), which is called to remove the driver, the following sequence may be observed:
Fix this by finishing the work before cleanup in qedi_remove().
CPU0 CPU1
|qedi_recovery_handler qedi_remove | __qedi_remove | iscsi_host_free | scsi_host_put | //free shost | |iscsi_host_for_each_session |//use qedi->shost
Cancel recovery_work and board_disable_work in __qedi_remove().
Which versions are affected by CVE-2023-54100?
How do I fix CVE-2023-54100?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2023-54100 being exploited?
There is no known exploitation of CVE-2023-54100 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54100, DEBIAN-CVE-2023-54100, GHSA-vqg2-rjjw-jc84, UBUNTU-CVE-2023-54100.