CVE Tools
Track your stack

CVE-2026-43074

eventpoll: defer struct eventpoll free to RCU grace period

No known exploitation. EPSS puts it in the 6th percentile. Fixed versions are out.

CVSS 3.17.8HighEPSS percentile6th0.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix1 product4 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • LinuxAffected: ≥ f2451def095c1743adcfcb0cb5dadc86034e162a, < 902120be4f44947df6311002addc7faf69bdbff1Upgrade to: 902120be4f44947df6311002addc7faf69bdbff1Affected: ≥ a1f93804449d13f97dabd4b996817de4bf1ed67a, < a6d57084372161f86660bc4607784420e00efe2cUpgrade to: a6d57084372161f86660bc4607784420e00efe2cAffected: ≥ 58c9b016e12855286370dfb704c08498edbc857a, < a6566cd33f6f967a7651ebf2ce0dd31572e319cfUpgrade to: a6566cd33f6f967a7651ebf2ce0dd31572e319cfAffected: ≥ 58c9b016e12855286370dfb704c08498edbc857a, < 5b1173b165421561db29f30afc7e97d940a398a9Upgrade to: 5b1173b165421561db29f30afc7e97d940a398a9 + 3 more branchesStated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

2 publishers

  1. Proof-of-concept published

    ·Хакер (xakep.ru) summary

Sourced from public security reporting — each date is when it was published, not when it happened. 2 further articles named this CVE in wider roundups without reporting it as a distinct event.

What it is

From the CVE record

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.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS6th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.2% chance of exploitation activity in the next 30 days, which ranks it in the 6th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

5 events over 50 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. Patch availablerecord updated
  3. Publishedweakness classified

Affected products

And 1 more affected product. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 7.8 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

Sources

References in the record

And 4 more references. See all after sign-in

In the news

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next serious one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Linux, not every advisory.