CVE-2025-21863: io_uring: prevent opcode speculation
First published: Wed Mar 12 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: io_uring: prevent opcode speculation sqe->opcode is used for different tables, make sure we santitise it against speculations.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=5.6<6.6.80 | |
| Linux Kernel | >=6.7<6.12.17 | |
| Linux Kernel | >=6.13<6.13.5 | |
| Linux Kernel | =6.14-rc1 | |
| Linux Kernel | =6.14-rc2 | |
| Linux Kernel | =6.14-rc3 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-21863?
CVE-2025-21863 has been assigned a moderate severity rating due to the potential exploitation of opcode speculation in the Linux kernel.
How do I fix CVE-2025-21863?
To fix CVE-2025-21863, ensure you update to the latest version of the Linux kernel where the vulnerability has been addressed.
What systems are affected by CVE-2025-21863?
CVE-2025-21863 affects the Linux kernel across all distributions that utilize the vulnerable version.
What is the nature of CVE-2025-21863?
CVE-2025-21863 is a vulnerability related to opcode speculation that can lead to unintended behavior in the Linux kernel.
Has CVE-2025-21863 been mitigated?
Yes, CVE-2025-21863 has been resolved in recent updates to the Linux kernel.
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