CVE-2026-74414 hfsplus: Remove the duplicate attr inode dirty marking action
A local attacker can cause a kernel crash via null pointer dereference in HFS+ filesystem when setting extended attributes on an unloaded attributes file.
- 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-2026-74414?
CVE-2026-74414 is a vulnerability in Linux, published on 15 Aug 2026. 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:
hfsplus: Remove the duplicate attr inode dirty marking action
Syzbot reported a null-ptr-deref in [1]. If the attributes file is not loaded during system mount, a trigger occurs [1] when setxattr is executed in userspace.
Remove the first mark attr inode dirty operation.
[1] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] Call Trace: hfsplus_setxattr+0x124/0x340 fs/hfsplus/xattr.c:555 hfsplus_trusted_setxattr+0x40/0x60 fs/hfsplus/xattr_trusted.c:30 __vfs_setxattr+0x43c/0x480 fs/xattr.c:218 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:252 vfs_setxattr+0x163/0x360 fs/xattr.c:339 do_setxattr fs/xattr.c:654 [inline]
Which versions are affected by CVE-2026-74414?
How do I fix CVE-2026-74414?
Apply the vendor's patch.
Is CVE-2026-74414 being exploited?
There is no known exploitation of CVE-2026-74414 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-74414, GHSA-ww36-wq8j-p7q8, UBUNTU-CVE-2026-74414.