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Vulnerability record · CVE-2026-43074 · published 6 May 2026

CVE-2026-43074: Linux kernel memory leak vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.18% · top 93.7% CWE-401 · Memory leak
7.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f Patch
https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9 Patch
https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427 Patch
https://git.kernel.org/stable/c/902120be4f44947df6311002addc7faf69bdbff1
https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf Patch
https://git.kernel.org/stable/c/a6d57084372161f86660bc4607784420e00efe2c
https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-43074), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.