CVE-2023-53672
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-07

Last updated on: 2026-02-26

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: output extra debug info if we failed to find an inline backref [BUG] Syzbot reported several warning triggered inside lookup_inline_extent_backref(). [CAUSE] As usual, the reproducer doesn't reliably trigger locally here, but at least we know the WARN_ON() is triggered when an inline backref can not be found, and it can only be triggered when @insert is true. (I.e. inserting a new inline backref, which means the backref should already exist) [ENHANCEMENT] After the WARN_ON(), dump all the parameters and the extent tree leaf to help debug.
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Meta Information
Published
2025-10-07
Last Modified
2026-02-26
Generated
2026-06-16
AI Q&A
2025-10-07
EPSS Evaluated
2026-06-15
NVD
CVE-2023-53672
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
linux linux_kernel 3.9
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel's btrfs filesystem involves a warning triggered when the system fails to find an inline back reference during insertion. Specifically, the function lookup_inline_extent_backref() triggers a WARN_ON() when it cannot find an expected inline back reference while inserting a new one. This indicates a potential inconsistency or bug in the extent tree management. The fix adds extra debug information to help diagnose the issue.

Impact Analysis

The vulnerability may cause warnings and potential instability in the btrfs filesystem due to inconsistencies in managing inline back references. While the exact impact is not detailed, such issues could lead to filesystem errors or data integrity problems during certain operations involving extent tree modifications.

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