CVE-2026-43074

HighCVSS 7.8/10Last modified Nov 11, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-401CWE-416

Affected software

VendorProductVersions
LinuxLinux>= f2451def095c1743adcfcb0cb5dadc86034e162a, < 902120be4f44947df6311002addc7faf69bdbff1; >= a1f93804449d13f97dabd4b996817de4bf1ed67a, < a6d57084372161f86660bc4607784420e00efe2c; >= 58c9b016e12855286370dfb704c08498edbc857a, < a6566cd33f6f967a7651ebf2ce0dd31572e319cf; >= 58c9b016e12855286370dfb704c08498edbc857a, < 5b1173b165421561db29f30afc7e97d940a398a9; >= 58c9b016e12855286370dfb704c08498edbc857a, < 7e8083f5eeedab0f460063b9c2c14c9a4e71a427; >= 58c9b016e12855286370dfb704c08498edbc857a, < ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322; >= 58c9b016e12855286370dfb704c08498edbc857a, < 07712db80857d5d09ae08f3df85a708ecfc3b61f
LinuxLinux6.4
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystem< *

References

Timeline

Published
May 6, 2026
Last modified
Nov 11, 2026
NVD status
Modified

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CVE-2026-43074: High severity, CVSS 7.8 | Vulnix