CVE-2025-21863
HIGHCVSS 7.8/10EPSS 0.22%
Last modified
CVE-2025-21863 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 5.6, < 6.6.80 | — |
| Linux | Linux Kernel | >= 6.7, < 6.12.17 | — |
| Linux | Linux Kernel | >= 6.13, < 6.13.5 | — |
| Linux | Linux Kernel | 6.14 | Rc1 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2025-21863?
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.
How severe is CVE-2025-21863?
CVE-2025-21863 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.
How do I fix CVE-2025-21863?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2025-21863?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST