CVE-2026-45899
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ext4 Filesystem Extent Cache Corruption on Split Failure

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ext4: drop extent cache when splitting extent fails When the split extent fails, we might leave some extents still being processed and return an error directly, which will result in stale extent entries remaining in the extent status tree. So drop all of the remaining potentially stale extents if the splitting fails.
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-45899
EUVD
EUVD-2026-32365
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's ext4 filesystem. When an operation to split an extent fails, some extents may remain in an inconsistent state because the system returns an error without properly clearing these extents. This results in stale extent entries remaining in the extent status tree, which can cause issues with filesystem integrity. The fix involves dropping all potentially stale extents if the splitting operation fails.

Impact Analysis

If this vulnerability is exploited or triggered, it can lead to stale or inconsistent extent entries in the ext4 filesystem's extent status tree. This may cause filesystem corruption or unexpected behavior when accessing files, potentially leading to data loss or system instability.

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