CVE-2026-23141
Modified Modified - Updated After Analysis
Invalid Memory Access in Linux Kernel btrfs Inline Extents

Publication date: 2026-02-14

Last updated on: 2026-06-01

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: send: check for inline extents in range_is_hole_in_parent() Before accessing the disk_bytenr field of a file extent item we need to check if we are dealing with an inline extent. This is because for inline extents their data starts at the offset of the disk_bytenr field. So accessing the disk_bytenr means we are accessing inline data or in case the inline data is less than 8 bytes we can actually cause an invalid memory access if this inline extent item is the first item in the leaf or access metadata from other items.
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Meta Information
Published
2026-02-14
Last Modified
2026-06-01
Generated
2026-06-16
AI Q&A
2026-02-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-23141
EUVD
EUVD-2026-5895
Affected Vendors & Products
Showing 8 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.13 (inc) to 6.18.7 (exc)
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 6.7 (inc) to 6.12.67 (exc)
linux linux_kernel From 4.11 (inc) to 6.6.122 (exc)
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Exploitability
CWE
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's btrfs filesystem, specifically in the send functionality. The issue arises because the code does not properly check if a file extent item is an inline extent before accessing its disk_bytenr field.

Inline extents store their data starting at the disk_bytenr field offset, so accessing this field without checking can lead to accessing inline data directly or, if the inline data is less than 8 bytes and the item is the first in the leaf, it can cause invalid memory access or access to metadata from other items.

Impact Analysis

This vulnerability can lead to invalid memory access when processing btrfs filesystem data. Such invalid memory access can cause system crashes, data corruption, or potentially allow an attacker to execute arbitrary code or cause denial of service.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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