CVE-2025-68251
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-16

Last updated on: 2025-12-18

Assigner: kernel.org

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()`.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-12-16
Last Modified
2025-12-18
Generated
2026-05-06
AI Q&A
2025-12-16
EPSS Evaluated
2026-05-05
NVD
CVE-2025-68251
EUVD
EUVD-2025-203645
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability in the Linux kernel's erofs filesystem involves infinite loops caused by corrupted subpage compact indexes. Specifically, the issue arises because the 'clusterofs' value can be larger than 'lclustersize' for certain corrupted subpage compact indexes, leading to an infinite loop when processing crafted images. The fix involves moving checks to ensure proper handling of these indexes and correcting the position of type checks during cluster loading.


How can this vulnerability impact me? :

The vulnerability can cause the Linux kernel to enter an infinite loop when processing specially crafted erofs images with corrupted subpage compact indexes. This could lead to system hangs or denial of service conditions, impacting system stability and availability.


Ask Our AI Assistant
Need more information? Ask your question to get an AI reply (Powered by our expertise)
0/70
EPSS Chart