CVE-2025-68767 hfsplus: Verify inode mode when loading from disk
A local attacker can cause memory corruption or system crash by mounting a maliciously crafted HFS+ filesystem with invalid inode modes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-68767?
CVE-2025-68767 is a memory corruption vulnerability in Linux, published on 13 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In the Linux kernel, the following vulnerability has been resolved:
hfsplus: Verify inode mode when loading from disk
syzbot is reporting that S_IFMT bits of inode->i_mode can become bogus when the S_IFMT bits of the 16bits "mode" field loaded from disk are corrupted.
According to [1], the permissions field was treated as reserved in Mac OS 8 and 9. According to [2], the reserved field was explicitly initialized with 0, and that field must remain 0 as long as reserved. Therefore, when the "mode" field is not 0 (i.e. no longer reserved), the file must be S_IFDIR if dir == 1, and the file must be one of S_IFREG/S_IFLNK/S_IFCHR/ S_IFBLK/S_IFIFO/S_IFSOCK if dir == 0.
Which versions are affected by CVE-2025-68767?
How do I fix CVE-2025-68767?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-68767 being exploited?
There is no known exploitation of CVE-2025-68767 in the wild and no public exploit code.
Sources
Also known as AZL-74315, BELL-CVE-2025-68767, DEBIAN-CVE-2025-68767, GHSA-mgmc-76vj-qf3j, ROOT-OS-DEBIAN-11-CVE-2025-68767, ROOT-OS-DEBIAN-12-CVE-2025-68767 and 4 more.