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CVE-2026-43074

eventpoll: defer struct eventpoll free to RCU grace period

Published: May 6, 2026Updated: Jun 1, 2026 Sources: CVE List NVDCWE-401
7.8HIGH
NVD MITRE
EPSS Score
0.1%
Top 97.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-401

Affected Products

Linux
oss-projectaka the linux kernel
LinuxOn-premOS
Operating Systems / linux-distro
and 1 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-43074?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f
git.kernel.org
https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9
git.kernel.org
https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427
git.kernel.org
and 4 more references View all →
News mentions
1

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