CVE-2026-43074

HIGH

eventpoll: defer struct eventpoll free to RCU grace period

Title source: cna

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.

References (5)

Core 5

Core References

https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf

https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9

https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427

https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322

https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f

Scores

CVSS v3 7.8

EPSS 0.0001

EPSS Percentile 2.5%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE

CWE-401

Status published

Products (15)

Linux/Linux < 6.4

Linux/Linux 58c9b016e12855286370dfb704c08498edbc857a - 07712db80857d5d09ae08f3df85a708ecfc3b61f

Linux/Linux 58c9b016e12855286370dfb704c08498edbc857a - 5b1173b165421561db29f30afc7e97d940a398a9

Linux/Linux 58c9b016e12855286370dfb704c08498edbc857a - 7e8083f5eeedab0f460063b9c2c14c9a4e71a427

Linux/Linux 58c9b016e12855286370dfb704c08498edbc857a - a6566cd33f6f967a7651ebf2ce0dd31572e319cf

Linux/Linux 58c9b016e12855286370dfb704c08498edbc857a - ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322

Linux/Linux 6.12.83 - 6.12.*

Linux/Linux 6.18.24 - 6.18.*

Linux/Linux 6.19.14 - 6.19.*

Linux/Linux 6.4

... and 5 more

Published May 06, 2026

Tracked Since May 06, 2026