Linux kernel btrfs: inline extent access leads to memory corruption
CVE-2026-23141 Published on February 14, 2026
btrfs: send: check for inline extents in range_is_hole_in_parent()
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.
Products Associated with CVE-2026-23141
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Affected Versions
Linux:- Version 82bfb2e7b645c8f228dc3b6d3b27b0b10125ca4f and below f2dc6ab3a14c2d2eb0b14783427eb9b03bf631c9 is affected.
- Version 82bfb2e7b645c8f228dc3b6d3b27b0b10125ca4f and below db00636643e66898d79f2530ac9c56ebd5eca369 is affected.
- Version 82bfb2e7b645c8f228dc3b6d3b27b0b10125ca4f and below 39f83f10772310ba4a77f2b5256aaf36994ef7e8 is affected.
- Version 82bfb2e7b645c8f228dc3b6d3b27b0b10125ca4f and below 08b096c1372cd69627f4f559fb47c9fb67a52b39 is affected.
- Version 4.11 is affected.
- Before 4.11 is unaffected.
- Version 6.6.122, <= 6.6.* is unaffected.
- Version 6.12.67, <= 6.12.* is unaffected.
- Version 6.18.7, <= 6.18.* is unaffected.
- Version 6.19, <= * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.