CVE-2025-21863

HIGH

Linux Kernel 5.6-6.6.80, 6.7-6.12.17, 6.13-6.13.5 - Unauthenticated Opcode Speculation via io_uring

Title source: llm
STIX 2.1

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.

References (7)

Core 7

Scores

CVSS v3 7.8
EPSS 0.0022
EPSS Percentile 13.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

Status published
Products (25)
linux/Kernel 5.11.0 - 5.15.209linux
linux/Kernel 5.16.0 - 6.1.175linux
linux/Kernel 5.6.0 - 5.10.259linux
linux/Kernel 5.6.0 - 6.6.80linux
linux/Kernel 6.13.0 - 6.13.5linux
linux/Kernel 6.2.0 - 6.6.80linux
linux/Kernel 6.7.0 - 6.12.17linux
Linux/Linux < 5.6
Linux/Linux 5.10.259 - 5.10.*
Linux/Linux 5.15.209 - 5.15.*
... and 15 more
Published Mar 12, 2025
Tracked Since Feb 18, 2026