In the Linux kernel, the following vulnerability has been resolved: ubifs: Free memory for tmpfile name When opening a ubifs tmpfile on an encrypted directory, function fscrypt_setup_filename allocates memory for the name that is to be stored in the directory entry, but after the name has been copied to the directory entry inode, the memory is not freed. When running kmemleak on it we see that it is registered as a leak. The report below is triggered by a simple program 'tmpfile' just opening a tmpfile: unreferenced object 0xffff88810178f380 (size 32): comm "tmpfile", pid 509, jiffies 4294934744 (age 1524.742s) backtrace: __kmem_cache_alloc_node __kmalloc fscrypt_setup_filename ubifs_tmpfile vfs_tmpfile path_openat Free this memory after it has been copied to the inode.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/107d481642c356a5668058066360fc473911e628 cve-icon cve-icon
https://git.kernel.org/stable/c/1e43d4284bdc3bd34bd770fea13910ac37ab0618 cve-icon cve-icon
https://git.kernel.org/stable/c/1fb815b38bb31d6af9bd0540b8652a0d6fe6cfd3 cve-icon cve-icon
https://git.kernel.org/stable/c/29738e1bcc799dd754711d4e4aab967f0c018175 cve-icon cve-icon
https://git.kernel.org/stable/c/823f554747f8aafaa965fb2f3ae794110ed429ef cve-icon cve-icon
https://git.kernel.org/stable/c/8ad8c67a897e68426e85990ebfe0a7d1f71fc79f cve-icon cve-icon
https://git.kernel.org/stable/c/b8f444a4fadfb5070ed7e298e0a5ceb4a18014f3 cve-icon cve-icon
https://git.kernel.org/stable/c/ce840284929b75dbbf062e0ce7fcb78a63b08b5e cve-icon cve-icon
https://git.kernel.org/stable/c/fd197308c0e4f738c7ea687d5332035c5753881c cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025091623-CVE-2023-53276-361c@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53276 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53276 cve-icon
History

Wed, 17 Sep 2025 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Wed, 17 Sep 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Low

Tue, 16 Sep 2025 08:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ubifs: Free memory for tmpfile name When opening a ubifs tmpfile on an encrypted directory, function fscrypt_setup_filename allocates memory for the name that is to be stored in the directory entry, but after the name has been copied to the directory entry inode, the memory is not freed. When running kmemleak on it we see that it is registered as a leak. The report below is triggered by a simple program 'tmpfile' just opening a tmpfile: unreferenced object 0xffff88810178f380 (size 32): comm "tmpfile", pid 509, jiffies 4294934744 (age 1524.742s) backtrace: __kmem_cache_alloc_node __kmalloc fscrypt_setup_filename ubifs_tmpfile vfs_tmpfile path_openat Free this memory after it has been copied to the inode.
Title ubifs: Free memory for tmpfile name
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-09-16T08:11:11.328Z

Updated: 2025-09-16T08:11:11.328Z

Reserved: 2025-09-16T08:09:37.990Z

Link: CVE-2023-53276

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-09-16T08:15:36.473

Modified: 2025-09-16T12:49:16.060

Link: CVE-2023-53276

cve-icon Redhat

Severity : Low

Publid Date: 2025-09-16T00:00:00Z

Links: CVE-2023-53276 - Bugzilla