01 Record

CVE-2025-21863

io_uring: prevent opcode speculation

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

io_uring: prevent opcode speculation

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.23% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 14.3% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-19.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2025-03-12 09:42Z1 YR AGO

Last updated

2026-06-19 11:57Z2 MO AGO

Reserved

2024-12-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

CWE-99Improper Control of Resource Identifiers ('Resource Injection')Class

Data version

5.2

Document digest

85fb176f32613c6e119ae42c44f6f36ea8bc90e92d70effd502dc17a42fbe926

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxd3656344fea0339fb0365c8df4d2beba4e0089cd to < 87e9eef43c758da267f6332678058a79764c7eba, d3656344fea0339fb0365c8df4d2beba4e0089cd to < 18eae8420081ef8e043ad455937bfb470ef08607, d3656344fea0339fb0365c8df4d2beba4e0089cd to < d261ead565a080e3411b0dd04e6d58a52471cac8, d3656344fea0339fb0365c8df4d2beba4e0089cd to < b9826e3b26ec031e9063f64a7c735449c43955e4, d3656344fea0339fb0365c8df4d2beba4e0089cd to < 506b9b5e8c2d2a411ea8fe361333f5081c56d23a, d3656344fea0339fb0365c8df4d2beba4e0089cd to < fdbfd52bd8b85ed6783365ff54c82ab7067bd61b, d3656344fea0339fb0365c8df4d2beba4e0089cd to < 1e988c3fe1264708f4f92109203ac5b1d65de50b, 5.6—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/87e9eef43c758da267f6332678058a79764c7eba
git.kernel.orghttps://git.kernel.org/stable/c/18eae8420081ef8e043ad455937bfb470ef08607
git.kernel.orghttps://git.kernel.org/stable/c/d261ead565a080e3411b0dd04e6d58a52471cac8
git.kernel.orghttps://git.kernel.org/stable/c/b9826e3b26ec031e9063f64a7c735449c43955e4
git.kernel.orghttps://git.kernel.org/stable/c/506b9b5e8c2d2a411ea8fe361333f5081c56d23a
git.kernel.orghttps://git.kernel.org/stable/c/fdbfd52bd8b85ed6783365ff54c82ab7067bd61b
git.kernel.orghttps://git.kernel.org/stable/c/1e988c3fe1264708f4f92109203ac5b1d65de50b

01 Record index

CVE-2025-21863

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2025-21863

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References