cbcvebase.
CVE-2023-53101
published 2025-05-02

CVE-2023-53101: 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…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.19%
8.9th percentile
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 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.

Affected

22 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.20-1 (bookworm)linux 6.1.20-1 (bookworm)
linuxlinux——
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < d6c1447e483c05dbcfb3ff77ac04237a82070b8cd6c1447e483c05dbcfb3ff77ac04237a82070b8c
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < 59eee0cdf8c036f554add97a4da7c06d7a9ff34a59eee0cdf8c036f554add97a4da7c06d7a9ff34a
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < 0d8a6c9a6415999fee1259ccf1796480c026b7d60d8a6c9a6415999fee1259ccf1796480c026b7d6
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < 3f00c476da8fe7c4c34ea16abb55d741271204133f00c476da8fe7c4c34ea16abb55d74127120413
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < 01a821aacc64d4b05dafd239dbc9b7856686002f01a821aacc64d4b05dafd239dbc9b7856686002f
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < 9cb27b1e76f0cc886ac09055bc41c0ab3f2051679cb27b1e76f0cc886ac09055bc41c0ab3f205167
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < 9e9a4cc5486356158554f6ad73027d8635a48b349e9a4cc5486356158554f6ad73027d8635a48b34
linuxlinux>= 393d1d1d76933886d5e1ce603214c9987589c6d5 < f5361da1e60d54ec81346aee8e3d8baf1be0b762f5361da1e60d54ec81346aee8e3d8baf1be0b762
linuxlinux_kernel< 4.14.3104.14.310
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.178-15.10.178-1
linuxlinux_kernel>= 0 < 6.1.20-16.1.20-1
linuxlinux_kernel>= 0 < 6.1.20-16.1.20-1
linuxlinux_kernel>= 0 < 6.1.20-16.1.20-1
linuxlinux_kernel>= 4.15 < 4.19.2784.19.278
linuxlinux_kernel>= 4.20 < 5.4.2375.4.237
linuxlinux_kernel>= 5.11 < 5.15.1035.15.103
linuxlinux_kernel>= 5.16 < 6.1.206.1.20
linuxlinux_kernel>= 5.5 < 5.10.1755.10.175
linuxlinux_kernel>= 6.2 < 6.2.76.2.7

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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