# CVE-2025-68251: linux: In the Linux kernel, the following vulnerability has been resolved:  erofs: avoid infinite loops due to corrupted sub...

CVE-2025-68251 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-68251, released December 16, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-68251
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 16, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  erofs: avoid infinite loops due to corrupted subpage compact indexes  Robert reported an infinite loop observed by two crafted images.  The root cause is that `clusterofs` can be larger than `lclustersize` for !NONHEAD `lclusters` in corrupted subpage compact indexes, e.g.:    blocksize = lclustersize = 512   lcn = 6   clusterofs = 515  Move the corresponding check for full compress indexes to `z_erofs_load_lcluster_from_disk()` to also cover subpage compact compress indexes.  It also fixes the position of `m->type >= Z_EROFS_LCLUSTER_TYPE_MAX` check, since it should be placed right after `z_erofs_load_{compact,full}_lcluster()`.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.94-1 | [DEBIAN-CVE-2025-68251](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68251.md) | Dec 16, 2025 |
| Linux | linux Debian 14 | 6.17.6-1 | [DEBIAN-CVE-2025-68251](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68251.md) | Dec 16, 2025 |

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Data as of 2026-11-09T07:25:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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