Bug ID 705503: Context leaked from iRule DNS lookup

Last Modified: Jul 18, 2026

Affected Product(s):
BIG-IP DNS(all modules)

Known Affected Versions:
12.1.0, 12.1.0 hf1, 12.1.0 hf2, 12.1.1, 12.1.1 hf1, 12.1.1 hf2, 12.1.2, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 13.0.0, 13.0.0 hf1, 13.0.0 hf2, 13.0.0 hf3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3

Fixed In:
14.0.0, 13.1.0.4, 12.1.3.6

Opened: Feb 05, 2018

Severity: 3-Major

Symptoms

The memory usage increases, and stats are inaccurate.

Impact

Memory leak that accumulates over time and inaccurate stats.

Conditions

Call RESOLV::lookup from an iRule.

Workaround

There is no workaround other than not using RESOLV::lookup in an iRule.

Fix Information

Memory leak no longer occurs.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips