7.4 High

CVE-2026-95508 Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp response builders on small interface mtu

Description

A heap-based buffer overflow was found in the DHCPv6 and TFTP response builders of libslirp. When the host is configured with a small interface MTU, a guest-supplied DHCPv6 CLIENTID option or TFTP blksize option can overflow the reply buffer with attacker-controlled content and length, resulting in denial of service and potentially arbitrary code execution in the host process. The default interface MTU is not affected.

CVSS 3.1 detail

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

Exploitable remotely over the network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: High
Privileges required: None
Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: High

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 10	Versions not published
Red Hat Enterprise Linux 8	Versions not published
Red Hat Enterprise Linux 9	Versions not published
Red Hat OpenShift Container Platform 4	Versions not published
Red Hat OpenShift Container Platform 5	Versions not published

References

access.redhat.com access.redhat.com
RHBZ#2537748 bugzilla.redhat.com

Timeline

Published September 22, 2026
Last modified November 6, 2026

The 1455 CVEs of Red Hat Enterprise Linux 10 →

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