BugZero | F5 BugID 1637797 - Memory leak in TMM of TCL memory when a procedure ...

F5 - Defect ID: 1637797

Memory leak in TMM of TCL memory when a procedure is called with too few arguments

F5 - Defect ID: 1637797

Memory leak in TMM of TCL memory when a procedure is called with too few arguments

Last updated on July 28th, 2026

BugZero Risk Score
6.8 Medium

Overall: 6.8

Severity: 7.3

Community: 4.2

Lifecycle: 7.8

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Bug Details

Priority: 3-Major
Status: Test
Impact Category: Local Traffic Manager

Description

Symptoms

TMM memory growth over time. There may be an error message in the LTM log similar to: 01220001:3: TCL error: /Common/irule <CLIENT_ACCEPTED> - wrong # args: should be "call my_proc <arg1> <arg2> while executing "call my_proc $variable" Note that the LTM log message may be throttled and not visible in the current logs.

Impact

- Memory leak in TMM. - TMM experiences an out-of-memory state and might crash.

Conditions

An iRule calls a procedure with insufficient arguments.

Workaround

Ensure that the called procedure provides enough arguments.

Fix Information

None

Change history

Links

Original Vendor Announcement

Relevant Products

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Affected versions:15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 15.1.10.6, 15.1.10.7, 15.1.10.8, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 16.1.5, 16.1.5.1, 16.1.5.2, 16.1.6, 16.1.6.1, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2, 17.1.3, 17.1.3.1, 17.1.3.2, 17.1.3.4

Fixed versions: No known fixed versions

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: No known fixed versions

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F5 - Defect ID: 1637797

Memory leak in TMM of TCL memory when a procedure is called with too few arguments

F5 - Defect ID: 1637797

Memory leak in TMM of TCL memory when a procedure is called with too few arguments

Last updated on July 28th, 2026

BugZero Risk Score6.8 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 1637797

Memory leak in TMM of TCL memory when a procedure is called with too few arguments

F5 - Defect ID: 1637797

Memory leak in TMM of TCL memory when a procedure is called with too few arguments

Last updated on July 28th, 2026

BugZero Risk Score6.8 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.8 Medium

BugZero Risk Score
6.8 Medium