CVE-2023-53035

HIGH EPSS 8.3%
Published May 2, 20251y ago · Modified Jun 17, 20261w ago
7.1 CVSS 3.1
High
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Published May 2, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix kernel-infoleak in nilfs_ioctl_wrap_copy() The ioctl helper function nilfs_ioctl_wrap_copy(), which exchanges a metadata array to/from user space, may copy uninitialized buffer regions to user space memory for read-only ioctl commands NILFS_IOCTL_GET_SUINFO and NILFS_IOCTL_GET_CPINFO. This can occur when the element size of the user space metadata given by the v_size member of the argument nilfs_argv structure is larger than the size of the metadata element (nilfs_suinfo structure or nilfs_cpinfo structure) on the file system side. KMSAN-enabled kernels detect this issue as follows: BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xc0/0x100 lib/usercopy.c:33 instrument_copy_to_user include/linux/instrumented.h:121 [inline] _copy_to_user+0xc0/0x100 lib/usercopy.c:33 copy_to_user include/linux/uaccess.h:169 [inline] nilfs_ioctl_wrap_copy+0x6fa/0xc10 fs/nilfs2/ioctl.c:99 nilfs_ioctl_get_info fs/nilfs2/ioctl.c:1173 [inline] nilfs_ioctl+0x2402/0x4450 fs/nilfs2/ioctl.c:1290 nilfs_compat_ioctl+0x1b8/0x200 fs/nilfs2/ioctl.c:1343 __do_compat_sys_ioctl fs/ioctl.c:968 [inline] __se_compat_sys_ioctl+0x7dd/0x1000 fs/ioctl.c:910 __ia32_compat_sys_ioctl+0x93/0xd0 fs/ioctl.c:910 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was created at: __alloc_pages+0x9f6/0xe90 mm/page_alloc.c:5572 alloc_pages+0xab0/0xd80 mm/mempolicy.c:2287 __get_free_pages+0x34/0xc0 mm/page_alloc.c:5599 nilfs_ioctl_wrap_copy+0x223/0xc10 fs/nilfs2/ioctl.c:74 nilfs_ioctl_get_info fs/nilfs2/ioctl.c:1173 [inline] nilfs_ioctl+0x2402/0x4450 fs/nilfs2/ioctl.c:1290 nilfs_compat_ioctl+0x1b8/0x200 fs/nilfs2/ioctl.c:1343 __do_compat_sys_ioctl fs/ioctl.c:968 [inline] __se_compat_sys_ioctl+0x7dd/0x1000 fs/ioctl.c:910 __ia32_compat_sys_ioctl+0x93/0xd0 fs/ioctl.c:910 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Bytes 16-127 of 3968 are uninitialized ... This eliminates the leak issue by initializing the page allocated as buffer using get_zeroed_page().

CVSS Details

Base Score
7.1
Exploitability
1.8
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
8.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥2.6.31  –  <4.14.312
linuxlinux_kernel*≥4.15  –  <4.19.280
linuxlinux_kernel*≥4.20  –  <5.4.240
linuxlinux_kernel*≥5.5  –  <5.10.177
linuxlinux_kernel*≥5.11  –  <5.15.105
linuxlinux_kernel*≥5.16  –  <6.1.22
linuxlinux_kernel*≥6.2  –  <6.2.9
linuxlinux_kernel6.3any
linuxlinux_kernel6.3any
linuxlinux_kernel6.3any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/003587000276f81d0114b5ce773d80c119d8cb30
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5bb105cc72beb9d51bf12f5c657336d2d35bdc5d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5f33b042f74fc9662eba17f4cd19b07d84bbc6c5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8a6550b365c0ce2e65905de57dcbfe1f7d629726
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8f5cbf6a8c0e19b062b829c5b7aca01468bb57f6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9c5034e9a0e03db8d5e9eabb176340259b5b97e4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a94932381e8dae4117e9129b3c1282e18aa97b05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d18db946cc6a394291539e030df32324285648f7
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/003587000276f81d0114b5ce773d80c119d8cb30
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5bb105cc72beb9d51bf12f5c657336d2d35bdc5d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5f33b042f74fc9662eba17f4cd19b07d84bbc6c5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8a6550b365c0ce2e65905de57dcbfe1f7d629726
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8f5cbf6a8c0e19b062b829c5b7aca01468bb57f6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9c5034e9a0e03db8d5e9eabb176340259b5b97e4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a94932381e8dae4117e9129b3c1282e18aa97b05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d18db946cc6a394291539e030df32324285648f7
    Patch