CVE-2025-71183
Description
A flaw was found in the Linux kernel's Btrfs filesystem log replay mechanism. After performing a rename exchange operation on two directories followed by an fsync and power failure, the log tree may contain incomplete inode information. During log replay, Btrfs incorrectly attempts to delete a directory that was never deleted, and if that directory contains a subvolume, the mount fails with a transaction abort because the replay code cannot handle directory entries pointing to root items.
Statement
This vulnerability requires a specific sequence: rename exchange of directories (one containing a subvolume), fsync, and power failure. The result is filesystem mount failure after recovery, not data corruption or code execution. Impact is denial of service requiring manual filesystem repair. The complexity of triggering this issue in practice is moderate.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | 5.5 | 9.1 |
| Attack Vector | Local | Local | Network |
| Attack Complexity | Low | Low | Low |
| Privileges Required | Low | Low | None |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | None | None |
| Integrity Impact | None | None | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Understanding the Weakness (CWE)
Availability,Access Control,Non-Repudiation
Technical Impact: DoS: Crash, Exit, or Restart; Bypass Protection Mechanism; Hide Activities
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