# CVE-2023-53396: linux: In the Linux kernel, the following vulnerability has been resolved:  ubifs: Fix memory leak in do_rename  If renaming...

CVE-2023-53396 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53396, released September 18, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-53396
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 18, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  ubifs: Fix memory leak in do_rename  If renaming a file in an encrypted directory, function fscrypt_setup_filename allocates memory for a file name. This name is never used, and before returning to the caller the memory for it 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 'rename' that renames a file in an encrypted directory:    unreferenced object 0xffff888101502840 (size 32):     comm "rename", pid 9404, jiffies 4302582475 (age 435.735s)     backtrace:       __kmem_cache_alloc_node       __kmalloc       fscrypt_setup_filename       do_rename       ubifs_rename       vfs_rename       do_renameat2  To fix this we can remove the call to fscrypt_setup_filename as it's not needed.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.37-1 | [DEBIAN-CVE-2023-53396](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53396.md) | Sep 18, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.3.7-1 | [DEBIAN-CVE-2023-53396](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53396.md) | Sep 18, 2025 |
| Linux | linux Debian 14 | 6.3.7-1 | [DEBIAN-CVE-2023-53396](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53396.md) | Sep 18, 2025 |

---

Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.