CVE-2026-43308
Linux Kernel Btrfs Memory Corruption Bug
Publication date: 2026-05-08
Last updated on: 2026-05-08
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 | * |
| 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 is in the Linux kernel's btrfs filesystem. It involves the kernel calling BUG() when encountering an unexpected delayed reference type in the function run_one_delayed_ref().
The fix changes this behavior so that instead of causing a kernel BUG() (which typically crashes or halts the kernel), the system will simply return an error and log an error message.
How can this vulnerability impact me? :
If the vulnerability is triggered, the Linux kernel could BUG(), which usually results in a kernel panic or crash, potentially causing system instability or downtime.
By fixing this issue to return an error instead of BUG(), the system becomes more stable and resilient to unexpected delayed reference types in btrfs, reducing the risk of crashes.