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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
58c9b016e12855286370dfb704c08498edbc857a affected < a6566cd33f6f967a7651ebf2ce0dd31572e319cf
58c9b016e12855286370dfb704c08498edbc857a affected < 5b1173b165421561db29f30afc7e97d940a398a9
58c9b016e12855286370dfb704c08498edbc857a affected < 7e8083f5eeedab0f460063b9c2c14c9a4e71a427
58c9b016e12855286370dfb704c08498edbc857a affected < ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322
58c9b016e12855286370dfb704c08498edbc857a affected < 07712db80857d5d09ae08f3df85a708ecfc3b61f
Linux Linux affected
Version Status Constraints
6.4 affected —
0 unaffected < 6.4
6.6.136 unaffected ≤ 6.6.*
6.12.83 unaffected ≤ 6.12.*
6.18.24 unaffected ≤ 6.18.*
6.19.14 unaffected ≤ 6.19.*
7.0 unaffected ≤ *

No data.

No data.

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f cve-icon cve-icon
https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9 cve-icon cve-icon
https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427 cve-icon cve-icon
https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf cve-icon cve-icon
https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322 cve-icon cve-icon
History

Wed, 06 May 2026 12:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Wed, 06 May 2026 09:30:00 +0000

Type Values Removed Values Added
Description 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.
Title eventpoll: defer struct eventpoll free to RCU grace period
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-06T07:21:58.210Z

Reserved: 2026-05-01T14:12:55.982Z

Link: CVE-2026-43074

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-06T10:16:20.343

Modified: 2026-05-06T13:08:07.970

Link: CVE-2026-43074

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-06T11:45:03Z

Weaknesses

No weakness.