HighFix available
eventpoll: defer struct eventpoll free to RCU grace period
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.12.83, 6.18.24, 6.19.14, 6.6.136
- CVEs
- CVE-2026-43074
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 03:09 UTC · Revision 1
Source evidence
eventpoll: defer struct eventpoll free to RCU grace period
core-osv · Original sourcePublished 6 May 2026, 07:21 UTC
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.
osv:CVE-2026-43074
Kernel
Fixed versions: 6.6.136, 6.12.83, 6.18.24, 6.19.14
Complete source record
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"url": "https://osv.dev/vulnerability/CVE-2026-43074",
"method": "structured",
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"title": "eventpoll: defer struct eventpoll free to RCU grace period",
"summary": "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.",
"evidence": "osv:CVE-2026-43074",
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"modified": "2026-10-28T02:30:42.052724259Z",
"provider": "osv",
"references": [
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"security_relevant": true,
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"source_id": "core-osv",
"document_id": 509721,
"published_at": "2026-05-06T07:21:58.21+00:00"
}