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.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 18% of CVEs (scores of 2026-10-25)

Published

2025-03-12

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/18eae8420081ef8e043ad455937bfb470ef08607
• https://git.kernel.org/stable/c/1e988c3fe1264708f4f92109203ac5b1d65de50b
• https://git.kernel.org/stable/c/506b9b5e8c2d2a411ea8fe361333f5081c56d23a
• https://git.kernel.org/stable/c/87e9eef43c758da267f6332678058a79764c7eba
• https://git.kernel.org/stable/c/b9826e3b26ec031e9063f64a7c735449c43955e4

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