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.
Analysis and contextual insights are available on OpenCVE Cloud.
Remediation
Vendor Workaround
Do not configure SlirpConfig.if_mtu below the IPv6 minimum link MTU of 1280.
Tracking
Sign in to view the affected projects.
Advisories
No advisories yet.
References
History
Tue, 22 Sep 2026 08:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp response builders on small interface mtu | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat openshift |
|
| Weaknesses | CWE-787 | |
| CPEs | cpe:/a:redhat:openshift:4 cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat openshift |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-09-22T08:36:01.598Z
Reserved: 2026-09-22T07:22:20.302Z
Link: CVE-2026-95508
No data.
Status : Received
Published: 2026-09-22T09:17:06.073
Modified: 2026-09-22T09:17:06.073
Link: CVE-2026-95508
No data.
OpenCVE Enrichment
Updated: 2026-09-22T10:30:17Z
Weaknesses
-
CWE-787
Out-of-bounds Write