# CVE-2023-54050: linux: In the Linux kernel, the following vulnerability has been resolved:  ubifs: Fix memleak when insert_old_idx() failed...

CVE-2023-54050 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-54050, released December 24, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-54050
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 24, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  ubifs: Fix memleak when insert_old_idx() failed  Following process will cause a memleak for copied up znode:  dirty_cow_znode   zn = copy_znode(c, znode);   err = insert_old_idx(c, zbr->lnum, zbr->offs);   if (unlikely(err))      return ERR_PTR(err);   // No one refers to zn.  Fetch a reproducer in [Link].  Function copy_znode() is split into 2 parts: resource allocation and znode replacement, insert_old_idx() is split in similar way, so resource cleanup could be done in error handling path without corrupting metadata(mem & disk). It's okay that old index inserting is put behind of add_idx_dirt(), old index is used in layout_leb_in_gaps(), so the two processes do not depend on each other.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.37-1 | [DEBIAN-CVE-2023-54050](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54050.md) | Dec 24, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.3.7-1 | [DEBIAN-CVE-2023-54050](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54050.md) | Dec 24, 2025 |
| Linux | linux Debian 14 | 6.3.7-1 | [DEBIAN-CVE-2023-54050](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54050.md) | Dec 24, 2025 |

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