CVE-2025-38206 exfat: fix double free in delayed_free
A double free vulnerability in the Linux kernel's exFAT filesystem allows attackers to cause a denial of service or potentially execute arbitrary code.
- 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-2025-38206?
CVE-2025-38206 is a high-severity use after free vulnerability in Debian Debian Linux, published on 4 Jul 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:
exfat: fix double free in delayed_free
The double free could happen in the following path.
exfat_create_upcase_table() exfat_create_upcase_table() : return error exfat_free_upcase_table() : free ->vol_utbl exfat_load_default_upcase_table : return error exfat_kill_sb() delayed_free() exfat_free_upcase_table() <--------- double free This patch set ->vol_util as NULL after freeing it.
Weakness: CWE-415
Which versions are affected by CVE-2025-38206?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-38206?
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-2025-38206 being exploited?
There is no known exploitation of CVE-2025-38206 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2025-38206, DEBIAN-CVE-2025-38206, GHSA-349q-hp2f-r4hf, ROOT-OS-DEBIAN-11-CVE-2025-38206, ROOT-OS-DEBIAN-12-CVE-2025-38206, ROOT-OS-DEBIAN-13-CVE-2025-38206 and 3 more.