CVE-2023-53276

ubifs: Free memory for tmpfile name

State: Published
Severity: 5.5 Medium
Published: Sep 16, 2025
Updated: May 11, 2026
Reserved: Sep 16, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

Product	Versions
LinuxLinux	f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 8ad8c67a897e68426e85990ebfe0a7d1f71fc79fAffected f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 107d481642c356a5668058066360fc473911e628Affected f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 823f554747f8aafaa965fb2f3ae794110ed429efAffected f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before b8f444a4fadfb5070ed7e298e0a5ceb4a18014f3Affected f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before ce840284929b75dbbf062e0ce7fcb78a63b08b5eAffected f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 29738e1bcc799dd754711d4e4aab967f0c018175Affected f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before fd197308c0e4f738c7ea687d5332035c5753881cAffected f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 1e43d4284bdc3bd34bd770fea13910ac37ab0618Affected f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 1fb815b38bb31d6af9bd0540b8652a0d6fe6cfd3Affected
LinuxLinux	4.10Affected before 4.10Not affected 4.14.315 through 4.14.Not affected 4.19.283 through 4.19.Not affected 5.4.243 through 5.4.Not affected 5.10.180 through 5.10.Not affected 5.15.111 through 5.15.Not affected 6.1.28 through 6.1.Not affected 6.2.15 through 6.2.Not affected 6.3.2 through 6.3.Not affected 6.4 and laterNot affected

Product

Versions

LinuxLinux

f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 8ad8c67a897e68426e85990ebfe0a7d1f71fc79fAffected
f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 107d481642c356a5668058066360fc473911e628Affected
f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 823f554747f8aafaa965fb2f3ae794110ed429efAffected
f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before b8f444a4fadfb5070ed7e298e0a5ceb4a18014f3Affected
f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before ce840284929b75dbbf062e0ce7fcb78a63b08b5eAffected
f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 29738e1bcc799dd754711d4e4aab967f0c018175Affected
f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before fd197308c0e4f738c7ea687d5332035c5753881cAffected
f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 1e43d4284bdc3bd34bd770fea13910ac37ab0618Affected
f4f61d2cc6d8789a52245a4733b3e5643be154f3 to before 1fb815b38bb31d6af9bd0540b8652a0d6fe6cfd3Affected

LinuxLinux

4.10Affected
before 4.10Not affected
4.14.315 through 4.14.*Not affected
4.19.283 through 4.19.*Not affected
5.4.243 through 5.4.*Not affected
5.10.180 through 5.10.*Not affected
5.15.111 through 5.15.*Not affected
6.1.28 through 6.1.*Not affected
6.2.15 through 6.2.*Not affected
6.3.2 through 6.3.*Not affected
6.4 and laterNot affected

References

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