CVE-2025-71268
Memory Leak in Linux Kernel btrfs Inline Extent Reservation
Publication date: 2026-03-18
Last updated on: 2026-03-18
Assigner: kernel.org
Description
Description
CVSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
| linux_kernel | btrfs | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the Linux kernel's btrfs filesystem. It involves a reservation leak that occurs in certain error paths when inserting an inline extent. Specifically, if the system fails to allocate a path or join a transaction during the __cow_file_range_inline() function, it returns without freeing the reserved quota group (qgroup) data, causing a resource leak. The fix ensures that the reserved qgroup data is properly freed in these error cases.
How can this vulnerability impact me? :
The impact of this vulnerability is a resource leak in the btrfs filesystem. If the reserved qgroup data is not freed properly during certain error conditions, it could lead to inefficient resource usage or exhaustion over time. This might degrade system performance or stability, especially on systems heavily using btrfs with quota groups.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
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How can this vulnerability be detected on my network or system? Can you suggest some commands?
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What immediate steps should I take to mitigate this vulnerability?
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