In the Linux kernel, the following vulnerability has been resolved:
ext4: zero i_disksize when initializing the bootloader inode
If the boot loader inode has never been used before, the
EXT4_IOC_SWAP_BOOT inode will initialize it, including setting the
i_size to 0. However, if the "never before used" boot loader has a
non-zero i_size, then i_disksize will be non-zero, and the
inconsistency between i_size and i_disksize can trigger a kernel
warning:
WARNING: CPU: 0 PID: 2580 at fs/ext4/file.c:319
CPU: 0 PID: 2580 Comm: bb Not tainted 6.3.0-rc1-00004-g703695902cfa
RIP: 0010:ext4_file_write_iter+0xbc7/0xd10
Call Trace:
vfs_write+0x3b1/0x5c0
ksys_write+0x77/0x160
__x64_sys_write+0x22/0x30
do_syscall_64+0x39/0x80
Reproducer:
1. create corrupted image and mount it:
mke2fs -t ext4 /tmp/foo.img 200
debugfs -wR "sif <5> size 25700" /tmp/foo.img
mount -t ext4 /tmp/foo.img /mnt
cd /mnt
echo 123 > file
2. Run the reproducer program:
posix_memalign(&buf, 1024, 1024)
fd = open("file", O_RDWR | O_DIRECT);
ioctl(fd, EXT4_IOC_SWAP_BOOT);
write(fd, buf, 1024);
Fix this by setting i_disksize as well as i_size to zero when
initiaizing the boot loader inode.
References
Configurations
Configuration 1 (hide)
|
History
10 Nov 2025, 17:56
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/01a821aacc64d4b05dafd239dbc9b7856686002f - Patch | |
| References | () https://git.kernel.org/stable/c/0d8a6c9a6415999fee1259ccf1796480c026b7d6 - Patch | |
| References | () https://git.kernel.org/stable/c/3f00c476da8fe7c4c34ea16abb55d74127120413 - Patch | |
| References | () https://git.kernel.org/stable/c/59eee0cdf8c036f554add97a4da7c06d7a9ff34a - Patch | |
| References | () https://git.kernel.org/stable/c/9cb27b1e76f0cc886ac09055bc41c0ab3f205167 - Patch | |
| References | () https://git.kernel.org/stable/c/9e9a4cc5486356158554f6ad73027d8635a48b34 - Patch | |
| References | () https://git.kernel.org/stable/c/d6c1447e483c05dbcfb3ff77ac04237a82070b8c - Patch | |
| References | () https://git.kernel.org/stable/c/f5361da1e60d54ec81346aee8e3d8baf1be0b762 - Patch | |
| CWE | NVD-CWE-noinfo | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
Information
Published : 2025-05-02 16:15
Updated : 2025-11-10 17:56
NVD link : CVE-2023-53101
Mitre link : CVE-2023-53101
CVE.ORG link : CVE-2023-53101
JSON object : View
Products Affected
linux
- linux_kernel
CWE