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

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00028.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*

No data.

No data.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/1e988c3fe1264708f4f92109203ac5b1d65de50b cve-icon cve-icon
https://git.kernel.org/stable/c/506b9b5e8c2d2a411ea8fe361333f5081c56d23a cve-icon cve-icon
https://git.kernel.org/stable/c/b9826e3b26ec031e9063f64a7c735449c43955e4 cve-icon cve-icon
https://git.kernel.org/stable/c/fdbfd52bd8b85ed6783365ff54c82ab7067bd61b cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025031217-CVE-2025-21863-a73a@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-21863 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-21863 cve-icon
History

Wed, 01 Oct 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Sat, 12 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00023}

 epss

{'score': 0.00031}

Fri, 21 Mar 2025 07:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-99

Thu, 13 Mar 2025 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

 cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Thu, 13 Mar 2025 02:00:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Wed, 12 Mar 2025 09:45:00 +0000

Type Values Removed Values Added
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.
Title io_uring: prevent opcode speculation
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-10-01T19:26:37.446Z

Reserved: 2024-12-29T08:45:45.780Z

Link: CVE-2025-21863

cve-icon Vulnrichment

Updated: 2025-10-01T16:58:39.866Z

cve-icon NVD

Status : Modified

Published: 2025-03-12T10:15:19.387

Modified: 2025-10-01T20:18:30.813

Link: CVE-2025-21863

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-03-12T00:00:00Z

Links: CVE-2025-21863 - Bugzilla

cve-icon OpenCVE Enrichment

No data.