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CVE-2023-53101— ext4: zero i_disksize when initializing the bootloader inode

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4文件系统未正确初始化引导加载程序inode的i_disksize，可能导致内核警告。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.20% · P10

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 393d1d1d76933886d5e1ce603214c9987589c6d5< d6c1447e483c05dbcfb3ff77ac04237a82070b8c affected
393d1d1d76933886d5e1ce603214c9987589c6d5< 59eee0cdf8c036f554add97a4da7c06d7a9ff34a affected
393d1d1d76933886d5e1ce603214c9987589c6d5< 0d8a6c9a6415999fee1259ccf1796480c026b7d6 affected
393d1d1d76933886d5e1ce603214c9987589c6d5< 3f00c476da8fe7c4c34ea16abb55d74127120413 affected
393d1d1d76933886d5e1ce603214c9987589c6d5< 01a821aacc64d4b05dafd239dbc9b7856686002f affected
393d1d1d76933886d5e1ce603214c9987589c6d5< 9cb27b1e76f0cc886ac09055bc41c0ab3f205167 affected
393d1d1d76933886d5e1ce603214c9987589c6d5< 9e9a4cc5486356158554f6ad73027d8635a48b34 affected
393d1d1d76933886d5e1ce603214c9987589c6d5< f5361da1e60d54ec81346aee8e3d8baf1be0b762 affected
… +10 more rows
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I. Basic Information for CVE-2023-53101

Vulnerability Information
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Vulnerability Title
ext4: zero i_disksize when initializing the bootloader inode
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4文件系统未正确初始化引导加载程序inode的i_disksize，可能导致内核警告。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 393d1d1d76933886d5e1ce603214c9987589c6d5 ~ d6c1447e483c05dbcfb3ff77ac04237a82070b8c -
Linux Linux 3.10 -

II. Public POCs for CVE-2023-53101

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III. Intelligence Information for CVE-2023-53101

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Patches & Fixes for CVE-2023-53101 (8)

Same Patch Batch · Linux · 2025-05-02 · 107 CVEs total

CVE-2023-53116 9.8 CRITICAL nvmet: avoid potential UAF in nvmet_req_complete()
CVE-2023-53083 9.8 CRITICAL nfsd: don't replace page in rq_pages if it's a continuation of last page
CVE-2023-53086 8.8 HIGH wifi: mt76: connac: do not check WED status for non-mmio devices
CVE-2025-37798 7.8 HIGH codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog()
CVE-2023-53138 7.8 HIGH net: caif: Fix use-after-free in cfusbl_device_notify()
CVE-2023-53111 7.8 HIGH loop: Fix use-after-free issues
CVE-2023-53107 7.8 HIGH veth: Fix use after free in XDP_REDIRECT
CVE-2023-53102 7.8 HIGH ice: xsk: disable txq irq before flushing hw
CVE-2023-53100 7.8 HIGH ext4: fix WARNING in ext4_update_inline_data
CVE-2023-53094 7.8 HIGH tty: serial: fsl_lpuart: fix race on RX DMA shutdown
CVE-2023-53090 7.8 HIGH drm/amdkfd: Fix an illegal memory access
CVE-2023-53088 7.8 HIGH mptcp: fix UaF in listener shutdown
CVE-2023-53087 7.8 HIGH drm/i915/active: Fix misuse of non-idle barriers as fence trackers
CVE-2023-53084 7.8 HIGH drm/shmem-helper: Remove another errant put in error path
CVE-2023-53080 7.8 HIGH xsk: Add missing overflow check in xdp_umem_reg
CVE-2023-53072 7.8 HIGH mptcp: use the workqueue to destroy unaccepted sockets
CVE-2023-53065 7.8 HIGH perf/core: Fix perf_output_begin parameter is incorrectly invoked in perf_event_bpf_output
CVE-2023-53057 7.8 HIGH Bluetooth: HCI: Fix global-out-of-bounds
CVE-2023-53052 7.8 HIGH cifs: fix use-after-free bug in refresh_cache_worker()
CVE-2023-53043 7.8 HIGH arm64: dts: qcom: sc7280: Mark PCIe controller as cache coherent

Showing top 20 of 107 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux