Linux Kernel up to 6.2.8 nilfs2 lib/usercopy.c nilfs_ioctl_wrap_copy nilfs_argv uninitialized pointer

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6.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel up to 6.2.8. The affected element is the function nilfs_ioctl_wrap_copy in the library lib/usercopy.c of the component nilfs2. This manipulation of the argument nilfs_argv causes uninitialized pointer. This vulnerability is registered as CVE-2023-53035. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.2.8. Affected by this vulnerability is the function nilfs_ioctl_wrap_copy in the library lib/usercopy.c of the component nilfs2. The manipulation of the argument nilfs_argv with an unknown input leads to a uninitialized pointer vulnerability. The CWE definition for the vulnerability is CWE-824. The product accesses or uses a pointer that has not been initialized. The impact remains unknown. The summary by CVE is:

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().

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-53035 since 03/27/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 249989 (Linux Distros Unpatched Vulnerability : CVE-2023-53035), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.312, 4.19.280, 5.4.240, 5.10.177, 5.15.105, 6.1.22 or 6.2.9 eliminates this vulnerability. Applying the patch a94932381e8dae4117e9129b3c1282e18aa97b05/9c5034e9a0e03db8d5e9eabb176340259b5b97e4/8f5cbf6a8c0e19b062b829c5b7aca01468bb57f6/d18db946cc6a394291539e030df32324285648f7/5bb105cc72beb9d51bf12f5c657336d2d35bdc5d/5f33b042f74fc9662eba17f4cd19b07d84bbc6c5/8a6550b365c0ce2e65905de57dcbfe1f7d629726/003587000276f81d0114b5ce773d80c119d8cb30 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (249989). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Uninitialized pointer
CWE: CWE-824 / CWE-908
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 249989
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53035

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.14.312/4.19.280/5.4.240/5.10.177/5.15.105/6.1.22/6.2.9
Patch: a94932381e8dae4117e9129b3c1282e18aa97b05/9c5034e9a0e03db8d5e9eabb176340259b5b97e4/8f5cbf6a8c0e19b062b829c5b7aca01468bb57f6/d18db946cc6a394291539e030df32324285648f7/5bb105cc72beb9d51bf12f5c657336d2d35bdc5d/5f33b042f74fc9662eba17f4cd19b07d84bbc6c5/8a6550b365c0ce2e65905de57dcbfe1f7d629726/003587000276f81d0114b5ce773d80c119d8cb30

Timelineinfo

03/27/2025 🔍
05/02/2025 +35 days 🔍
05/02/2025 +0 days 🔍
01/27/2026 +270 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53035 (🔍)
GCVE (CVE): GCVE-0-2023-53035
GCVE (VulDB): GCVE-100-307225

Entryinfo

Created: 05/02/2025 19:50
Updated: 01/27/2026 20:31
Changes: 05/02/2025 19:50 (60), 08/17/2025 23:08 (2), 01/27/2026 20:31 (12)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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