HOMEVULNERABILITIESCVE-2026-43074
HIGH

CVE-2026-43074

Published: May 6, 2026· Updated: May 8, 2026

7.8
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:4.8th

Official 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.

NVD Source

Technical Analysis

CVE-2026-43074 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Mentioned vendors (from description):
Linux
CPE data not yet available in NVD for this CVE.

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

All References (5)

→
https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f
→
https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9
→
https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427
→
https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf
→
https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322

Quick Facts

CVE IDCVE-2026-43074
CVSS Score7.8 / 10
SeverityHIGH
CISA KEVNo
EPSS (30d)0.02%
PublishedMay 6, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-43074 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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