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-rw-r--r--src/dhcpv6-ia.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/dhcpv6-ia.c b/src/dhcpv6-ia.c
index 2de9710..42268e5 100644
--- a/src/dhcpv6-ia.c
+++ b/src/dhcpv6-ia.c
@@ -949,7 +949,8 @@ static size_t build_ia(uint8_t *buf, size_t buflen, uint16_t status,
size_t addrlen = (a->managed) ? (size_t)a->managed_size : iface->addr6_len;
for (size_t i = 0; i < addrlen; ++i) {
- if (!valid_addr(&addrs[i], now))
+ if (!valid_addr(&addrs[i], now) ||
+ !valid_prefix_length(a, addrs[i].prefix))
continue;
struct in6_addr addr = addrs[i].addr.in6;