CVE-2026-120830
HIGH
NVD
CVSS Score
7.4
Severity
HIGH
Published
Nov 03, 2026
Vendor
unknown
Description
A flaw was found in libslirp in icmp_forward_error(). When building an ICMP error response, the length of the quoted original IPv4 packet was taken from the IP header without clamping it to the actual buffer length. A truncated or malformed packet could cause an out-of-bounds heap read, leaking host memory into the ICMP error packet returned to a guest or container.