CVE-2025-21863

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Source
https://cve.org/CVERecord?id=CVE-2025-21863
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21863.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-21863
Downstream
Related
Published
2025-03-12T09:42:20.552Z
Modified
2026-06-03T03:54:32.027758598Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
io_uring: prevent opcode speculation
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21863.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
d3656344fea0339fb0365c8df4d2beba4e0089cd
Fixed
18eae8420081ef8e043ad455937bfb470ef08607
Fixed
d261ead565a080e3411b0dd04e6d58a52471cac8
Fixed
b9826e3b26ec031e9063f64a7c735449c43955e4
Fixed
506b9b5e8c2d2a411ea8fe361333f5081c56d23a
Fixed
fdbfd52bd8b85ed6783365ff54c82ab7067bd61b
Fixed
1e988c3fe1264708f4f92109203ac5b1d65de50b

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21863.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.6.0
Fixed
5.15.209
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.175
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.80
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.17
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.13.5

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21863.json"