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.
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Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
Do not configure SlirpConfig.if_mtu below the IPv6 minimum link MTU of 1280.
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
|
Projects
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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: 2026-09-22T09:30:07Z
Weaknesses