A flaw was found in libslirp. When handling ICMP echo requests, the reply length is not updated to match the actual data received from the host. Under specific conditions where the normal ICMP socket is unavailable, this length mismatch causes the host's real IP address to be leaked to the guest in the echo reply, breaking the NAT isolation that user-mode networking is expected to provide.
Metrics
Affected Vendors & Products
References
History
Fri, 23 Oct 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 23 Oct 2026 00:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in libslirp. When handling ICMP echo requests, the reply length is not updated to match the actual data received from the host. Under specific conditions where the normal ICMP socket is unavailable, this length mismatch causes the host's real IP address to be leaked to the guest in the echo reply, breaking the NAT isolation that user-mode networking is expected to provide. | |
| Title | Libslirp: libslirp: icmp echo reply length desynchronization leaks host ip to guest | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat openshift |
|
| Weaknesses | CWE-200 | |
| 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 |
threat_severity
|
cvssV3_1
|
Status: PUBLISHED
Assigner: redhat
Published: 2026-10-22T21:20:56.855Z
Updated: 2026-10-23T15:00:22.267Z
Reserved: 2026-10-22T14:40:34.103Z
Link: CVE-2026-115449
Updated: 2026-10-23T14:48:37.712Z
Status : Awaiting Analysis
Published: 2026-10-22T22:18:06.647
Modified: 2026-10-23T16:44:17.950
Link: CVE-2026-115449