CVE-2026-95508Hinoki check available

Host-process crash via undersized reply buffers

Published Sep 22, 2026 · Updated Sep 22, 2026

Heap buffer overflow in libslirp's DHCPv6 and TFTP reply builders allows guest OS users to crash the host process with crafted options. The builders copy attacker-controlled option content and length into a reply buffer sized for a small interface MTU without rejecting the oversized response. A nondefault small MTU is required; resulting heap corruption also permits arbitrary code execution in the host process.

CVSS severityUnavailable
Unscored
EPSS probability0.57%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Heap buffer overflow in libslirp's DHCPv6 and TFTP reply builders allows guest OS users to crash the host process with crafted options. The builders copy attacker-controlled option content and length into a reply buffer sized for a small interface MTU without rejecting the oversized response. A nondefault small MTU is required; resulting heap corruption also permits arbitrary code execution in the host process.

The record

CVE
CVE-2026-95508
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Commonhaus Foundation
Product
Red Hat Enterprise Linux 10
Classifications
T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Commonhaus Foundation · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat OpenShift Container Platform 4Affected versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started