io_uring/napi: cap busy_poll_to 10 msec
In the Linux kernel, the following vulnerability has been resolved: io_uring/napi: cap busy_poll_to 10 msec Currently there's no cap on the maximum amount of time that napi is allowed to poll if no events are found, which can lead to kernel complaints on a task being stuck as there's no conditional rescheduling done within that loop. Just cap it to 10 msec in total, that's already way above any kind of sane value that will reap any benefits, yet low enough that it's nowhere near being able to trigger preemption complaints.
CVE-2026-53321
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-2026-53321
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": "8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5",
"lessThan": "42785efe813e5a7d815f3b6be126e1bc0d12d2b6",
"versionType": "git"
},
{
"status": "affected",
"version": "8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5",
"lessThan": "39767f944a8c9e696566c37ad5b20131406c4b8d",
"versionType": "git"
},
{
"status": "affected",
"version": "8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5",
"lessThan": "cb3af525f8dfb8930f0c123e5755fa967a12d5c1",
"versionType": "git"
},
{
"status": "affected",
"version": "8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5",
"lessThan": "df8599ee18c0e5fe343ffe0b4c379636b8bb839a",
"versionType": "git"
}
],
"programFiles": [
"io_uring/napi.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.33",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"io_uring/napi.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53321
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46392 · Revision 1
- Added to Heist Feed
- Publisher date