In the Linux kernel, the following vulnerability has been resolved:
ext4: make sure the first directory block is not a hole
The syzbot constructs a directory that has no dirblock but is non-inline,
i.e. the first directory block is a hole. And no errors are reported when
creating files in this directory in the following flow.
ext4_mknod
...
ext4_add_entry
// Read block 0
ext4_read_dirblock(dir, block, DIRENT)
bh = ext4_bread(NULL, inode, block, 0)
if (!bh && (type == INDEX || type == DIRENT_HTREE))
// The first directory block is a hole
// But type == DIRENT, so no error is reported.
After that, we get a directory block without '.' and '..' but with a valid
dentry. This may cause some code that relies on dot or dotdot (such as
make_indexed_dir()) to crash.
Therefore when ext4_read_dirblock() finds that the first directory block
is a hole report that the filesystem is corrupted and return an error to
avoid loading corrupted data from disk causing something bad.
References
Configurations
Configuration 1 (hide)
|
History
03 Nov 2025, 22:17
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
07 Oct 2025, 20:26
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/299bc6ffa57e04e74c6cce866d6c0741fb4897a1 - Patch | |
| References | () https://git.kernel.org/stable/c/9771e3d8365ae1dd5e8846a204cb9af14e3e656a - Patch | |
| References | () https://git.kernel.org/stable/c/b609753cbbd38f8c0affd4956c0af178348523ac - Patch | |
| References | () https://git.kernel.org/stable/c/c3893d9de8ee153baac56d127d844103488133b5 - Patch | |
| References | () https://git.kernel.org/stable/c/d81d7e347d1f1f48a5634607d39eb90c161c8afe - Patch | |
| References | () https://git.kernel.org/stable/c/de2a011a13a46468a6e8259db58b1b62071fe136 - Patch | |
| References | () https://git.kernel.org/stable/c/e02f9941e8c011aa3eafa799def6a134ce06bcfa - Patch | |
| References | () https://git.kernel.org/stable/c/f9ca51596bbfd0f9c386dd1c613c394c78d9e5e6 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CWE | NVD-CWE-noinfo |
Information
Published : 2024-08-17 09:15
Updated : 2025-11-03 22:17
NVD link : CVE-2024-42304
Mitre link : CVE-2024-42304
CVE.ORG link : CVE-2024-42304
JSON object : View
Products Affected
linux
- linux_kernel
CWE