CVE-2026-90065Hinoki check available

Memory exhaustion via leaked internal TCP sockets

Published Sep 17, 2026 · Updated Sep 17, 2026

Memory leakage in Linux 6.11 SMC sockets allows local users to exhaust kernel memory through repeatedly denied socket creation calls. In net/smc/smc_inet.c, smc_inet_prot and smc_inet6_prot lack destroy hooks, so failed socket creation leaves the internal TCP socket allocated when smc_destruct returns early. Exploitation requires SMC support and the ability to attach a deny-all BPF_CGROUP_INET_SOCK_CREATE program to the task's cgroup, causing unbounded kernel memory growth.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Memory leakage in Linux 6.11 SMC sockets allows local users to exhaust kernel memory through repeatedly denied socket creation calls. In net/smc/smc_inet.c, smc_inet_prot and smc_inet6_prot lack destroy hooks, so failed socket creation leaves the internal TCP socket allocated when smc_destruct returns early. Exploitation requires SMC support and the ability to attach a deny-all BPF_CGROUP_INET_SOCK_CREATE program to the task's cgroup, causing unbounded kernel memory growth.

The record

CVE
CVE-2026-90065
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=6.11
  2. Affected versionversion=d25a92ccae6bed02327b63d138e12e7806830f78 <2f4ece7fed6d915ec64b7735962c0d84d6261032
  3. Affected versionversion=d25a92ccae6bed02327b63d138e12e7806830f78 <84180988a455fd8e147c6b35c8df65d8b8cc76c2
  4. Affected versionversion=d25a92ccae6bed02327b63d138e12e7806830f78 <94a913cd521c0f0408820bcdbd80dadf076d97b5
  5. Affected versionversion=d25a92ccae6bed02327b63d138e12e7806830f78 <cec261b0b4c5c0b044165303198d10ffcdf3414c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=d25a92ccae6bed02327b63d138e12e7806830f78 <2f4ece7fed6d915ec64b7735962c0d84d6261032; version=d25a92ccae6bed02327b63d138e12e7806830f78 <84180988a455fd8e147c6b35c8df65d8b8cc76c2; version=d25a92ccae6bed02327b63d138e12e7806830f78 <94a913cd521c0f0408820bcdbd80dadf076d97b5; version=d25a92ccae6bed02327b63d138e12e7806830f78 <cec261b0b4c5c0b044165303198d10ffcdf3414c

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.001OS Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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