PT-2025-44390 · Btrfs+5 · Btrfs+5
Published
2025-10-13
·
Updated
2026-05-07
·
CVE-2025-40100
CVSS v2.0
4.6
Medium
| Vector | AV:L/AC:L/Au:S/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a flaw within the btrfs subsystem related to the free space tree. Specifically, an assertion failure can occur during the construction of a free space tree when the block group tree feature is not enabled and a new, empty block group has been created within the current transaction. This happens because the code incorrectly expects to find block group items in the extent tree even when they haven't been added yet. This issue was identified through syzkaller testing, which reported an invalid opcode and kernel bug.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Assertion Failure
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Weakness Enumeration
Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Suse
Ubuntu
Btrfs