CVE-2026-43393
Received Received - Intake
Memory Leak in Linux Kernel Btrfs

Publication date: 2026-05-08

Last updated on: 2026-05-08

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies() Fix a chunk map leak in btrfs_map_block(): if we return early with -EINVAL, we're not freeing the chunk map that we've just looked up.
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Meta Information
Published
2026-05-08
Last Modified
2026-05-08
Generated
2026-05-09
AI Q&A
2026-05-08
EPSS Evaluated
N/A
NVD
CVE-2026-43393
EUVD
EUVD-2026-28699
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux_kernel btrfs *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a memory leak in the Linux kernel's Btrfs filesystem code. Specifically, in the function btrfs_map_block(), when an error occurs and the function returns early with the error code -EINVAL, the chunk map that was looked up is not properly freed, causing a leak of memory resources.


How can this vulnerability impact me? :

The impact of this vulnerability is that it can cause a memory leak in the Linux kernel when using the Btrfs filesystem. Over time, this leak could lead to increased memory usage, potentially degrading system performance or causing resource exhaustion, which might result in system instability or crashes.


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