Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP GTM, LTM
Known Affected Versions:
11.2.1, 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4
Fixed In:
11.6.0, 11.5.1 HF5, 11.5.0 HF1, 11.4.1 HF4, 11.2.1 HF11
Opened: Feb 08, 2014 Severity: 2-Critical Related Article:
K15718
Aborted connections with suspended DNS iRule may leak memory. libldns memory tag in umem grows indefinitely eventually leading to failover.
Memory leak (libldns variable in tmm memory_usage_stat)
DNS_RESPONSE/DNS_REQUEST with iRule command which suspends and gets the connection aborted (e.g. RESOLV::lookup) because it exceeded the expire timeout for an iRule.
Avoid iRule command(s) which suspend in a DNS_REQUEST or DNS_RESPONSE iRule event.
Prevent memory leak when iRule suspends or aborts an DNS command.