CVE-2026-43074high

CVE-2026-43074: high-severity vulnerability in Linux

eventpoll: defer struct eventpoll free to RCU grace period

Published · Updated

41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 7.8epss 0.2%
from disclosure to weapon73 days
Published on NVDMay 6
1st PoC+73d
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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
Linux · Linux
public PoCs found — 1
githubgithub.com/PeronGH/badepoll-selinux-disabler★ 5
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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References
https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61fhttps://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427https://git.kernel.org/stable/c/902120be4f44947df6311002addc7faf69bdbff1https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cfhttps://git.kernel.org/stable/c/a6d57084372161f86660bc4607784420e00efe2chttps://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322