PT-2025-11025 · Linux+9 · Linux Kernel+9

Published 2025-02-14 · Updated 2026-05-26 · CVE-2025-21863

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Linux kernel (affected versions not specified)

Description: A vulnerability in the Linux kernel has been resolved, related to io uring. The issue involves preventing opcode speculation, where sqe->opcode is used for different tables and needs to be sanitized against speculations.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Weakness Enumeration

CWE-20

CWE-99

Related Identifiers

ALSA-2025:20095

ALSA-2025:20518

ALT-PU-2025-12647

ALT-PU-2025-4807

AZL-58547

AZL-58563

BDU:2026-03115

CVE-2025-21863

ECHO-FFE2-CEF1-F3E2

INFSA-2025_20518

MGASA-2025-0111

MGASA-2025-0112

OESA-2025-1371

OESA-2025-1372

OESA-2025-1409

OESA-2025-1410

OESA-2025-1447

OPENSUSE-SU-2025_01614-1

OPENSUSE-SU-2025_01707-1

RHSA-2025:20095

RHSA-2025:20518

RHSA-2025_20518

RHSA-2026:1703

SUSE-SU-2025:01614-1

SUSE-SU-2025:01707-1

SUSE-SU-2025:01919-1

SUSE-SU-2025:01951-1

SUSE-SU-2025:01964-1

SUSE-SU-2025:01967-1

SUSE-SU-2025:20192-1

SUSE-SU-2025:20206-1

SUSE-SU-2025:20270-1

SUSE-SU-2025:20283-1

SUSE-SU-2025_01614-1

SUSE-SU-2025_01707-1

SUSE-SU-2025_01951-1

SUSE-SU-2025_01964-1

SUSE-SU-2025_01967-1

USN-7521-1

USN-7521-2

USN-7521-3

USN-7703-1

USN-7703-2

USN-7703-3

USN-7703-4

USN-7719-1

USN-7737-1

Affected Products

Alt Linux

Almalinux

Astra Linux

Debian

Linuxmint

Linux Kernel

Red Hat

Rocky Linux

Suse

Ubuntu

References · 2203

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21863.json · Exploit
• https://linux.oracle.com/errata/ELSA-2025-20530.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21793 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38083 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2025-0112 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21707 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21867 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21783 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-58007 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21938 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21767 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21863 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21718 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-58077 · Security Note
• https://ubuntu.com/security/CVE-2024-58084 · Vendor Advisory