eventpoll: defer struct eventpoll free to RCU grace period
In the Linux kernel, the following vulnerability has been resolved: eventpoll: defer struct eventpoll free to RCU grace period In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while it still being used by another concurrent thread. Defer the kfree() to an RCU callback to prevent UAF.
CVE-2026-43074
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-2026-43074
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": "f2451def095c1743adcfcb0cb5dadc86034e162a",
"lessThan": "902120be4f44947df6311002addc7faf69bdbff1",
"versionType": "git"
},
{
"status": "affected",
"version": "a1f93804449d13f97dabd4b996817de4bf1ed67a",
"lessThan": "a6d57084372161f86660bc4607784420e00efe2c",
"versionType": "git"
},
{
"status": "affected",
"version": "58c9b016e12855286370dfb704c08498edbc857a",
"lessThan": "a6566cd33f6f967a7651ebf2ce0dd31572e319cf",
"versionType": "git"
},
{
"status": "affected",
"version": "58c9b016e12855286370dfb704c08498edbc857a",
"lessThan": "5b1173b165421561db29f30afc7e97d940a398a9",
"versionType": "git"
},
{
"status": "affected",
"version": "58c9b016e12855286370dfb704c08498edbc857a",
"lessThan": "7e8083f5eeedab0f460063b9c2c14c9a4e71a427",
"versionType": "git"
},
{
"status": "affected",
"version": "58c9b016e12855286370dfb704c08498edbc857a",
"lessThan": "ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322",
"versionType": "git"
},
{
"status": "affected",
"version": "58c9b016e12855286370dfb704c08498edbc857a",
"lessThan": "07712db80857d5d09ae08f3df85a708ecfc3b61f",
"versionType": "git"
}
],
"programFiles": [
"fs/eventpoll.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.136",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.83",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.24",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.14",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/eventpoll.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43074
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40019 · Revision 1
- Added to Heist Feed
- Publisher date