---
title: "CVE-2026-95508: libslirp - Buffer Overflow"
description: "libslirp contains a heap-based buffer overflow caused by improper handling of DHCPv6 CLIENTID or TFTP blksize options with small interface MTU, letting attackers cause denial of service or remote code execution, exploit requires small MTU configuration."
url: https://panop.io/threat-heartbeat/CVE-2026-95508/
---

# CVE-2026-95508 libslirp - Buffer Overflow

libslirp contains a heap-based buffer overflow caused by improper handling of DHCPv6 CLIENTID or TFTP blksize options with small interface MTU, letting attackers cause denial of service or remote code execution, exploit requires small MTU configuration.

CVSS base score 7.4 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.57% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-95508)

## Details

Type

Buffer Overflow

Impact

Denial Of Service, Remote Code Execution

CVSS vector

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

Published

22 September 2026

Updated

15 October 2026

Weakness

[CWE-787](https://cwe.mitre.org/data/definitions/787.html)

## Vendor fix

Update to the latest version of libslirp.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-95508](https://nvd.nist.gov/vuln/detail/CVE-2026-95508)
- [https://access.redhat.com/security/cve/CVE-2026-95508](https://access.redhat.com/security/cve/CVE-2026-95508)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2537748](https://bugzilla.redhat.com/show_bug.cgi?id=2537748)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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