Unrated
io_uring: prevent opcode speculation
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.
Announced Source revision 1
Original source ↗CVE-2025-21863
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-21863
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "d3656344fea0339fb0365c8df4d2beba4e0089cd",
"lessThan": "87e9eef43c758da267f6332678058a79764c7eba",
"versionType": "git"
},
{
"status": "affected",
"version": "d3656344fea0339fb0365c8df4d2beba4e0089cd",
"lessThan": "18eae8420081ef8e043ad455937bfb470ef08607",
"versionType": "git"
},
{
"status": "affected",
"version": "d3656344fea0339fb0365c8df4d2beba4e0089cd",
"lessThan": "d261ead565a080e3411b0dd04e6d58a52471cac8",
"versionType": "git"
},
{
"status": "affected",
"version": "d3656344fea0339fb0365c8df4d2beba4e0089cd",
"lessThan": "b9826e3b26ec031e9063f64a7c735449c43955e4",
"versionType": "git"
},
{
"status": "affected",
"version": "d3656344fea0339fb0365c8df4d2beba4e0089cd",
"lessThan": "506b9b5e8c2d2a411ea8fe361333f5081c56d23a",
"versionType": "git"
},
{
"status": "affected",
"version": "d3656344fea0339fb0365c8df4d2beba4e0089cd",
"lessThan": "fdbfd52bd8b85ed6783365ff54c82ab7067bd61b",
"versionType": "git"
},
{
"status": "affected",
"version": "d3656344fea0339fb0365c8df4d2beba4e0089cd",
"lessThan": "1e988c3fe1264708f4f92109203ac5b1d65de50b",
"versionType": "git"
}
],
"programFiles": [
"io_uring/io_uring.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.80",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.17",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.5",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"io_uring/io_uring.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21863
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26963 · Revision 1
- Added to Heist Feed
- Publisher date