CVE-2025-71149
BaseFortify
Publication date: 2026-01-23
Last updated on: 2026-05-02
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | From 6.2 (inc) to 6.6.120 (exc) |
| linux | linux_kernel | From 6.7 (inc) to 6.12.64 (exc) |
| linux | linux_kernel | From 6.13 (inc) to 6.18.3 (exc) |
| linux | linux_kernel | From 6.0 (inc) to 6.1.160 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability involves the Linux kernel's io_uring subsystem, specifically in how it handles the io_poll_add() return value during updates. When an event polling request is updated from POLL_ADD to POLL_REMOVE, if the update causes the POLL_ADD event to trigger, the completion event is lost and a completion queue entry (CQE) is never posted. Additionally, the completion value may be incorrectly overwritten with -ECANCELED instead of retaining the correct value set by io_poll_add().
How can this vulnerability impact me? :
This vulnerability can cause loss of completion notifications in the io_uring subsystem, meaning that certain I/O operations may appear to never complete. This can lead to application hangs, incorrect behavior, or resource leaks because the completion events are not properly reported to the application.