CVE - CVE-2023-53101

CVE-ID
CVE-2023-53101	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/01a821aacc64d4b05dafd239dbc9b7856686002f URL:https://git.kernel.org/stable/c/01a821aacc64d4b05dafd239dbc9b7856686002f MISC:https://git.kernel.org/stable/c/0d8a6c9a6415999fee1259ccf1796480c026b7d6 URL:https://git.kernel.org/stable/c/0d8a6c9a6415999fee1259ccf1796480c026b7d6 MISC:https://git.kernel.org/stable/c/3f00c476da8fe7c4c34ea16abb55d74127120413 URL:https://git.kernel.org/stable/c/3f00c476da8fe7c4c34ea16abb55d74127120413 MISC:https://git.kernel.org/stable/c/59eee0cdf8c036f554add97a4da7c06d7a9ff34a URL:https://git.kernel.org/stable/c/59eee0cdf8c036f554add97a4da7c06d7a9ff34a MISC:https://git.kernel.org/stable/c/9cb27b1e76f0cc886ac09055bc41c0ab3f205167 URL:https://git.kernel.org/stable/c/9cb27b1e76f0cc886ac09055bc41c0ab3f205167 MISC:https://git.kernel.org/stable/c/9e9a4cc5486356158554f6ad73027d8635a48b34 URL:https://git.kernel.org/stable/c/9e9a4cc5486356158554f6ad73027d8635a48b34 MISC:https://git.kernel.org/stable/c/d6c1447e483c05dbcfb3ff77ac04237a82070b8c URL:https://git.kernel.org/stable/c/d6c1447e483c05dbcfb3ff77ac04237a82070b8c MISC:https://git.kernel.org/stable/c/f5361da1e60d54ec81346aee8e3d8baf1be0b762 URL:https://git.kernel.org/stable/c/f5361da1e60d54ec81346aee8e3d8baf1be0b762
Assigning CNA
kernel.org
Date Record Created
20250502	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250502)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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