Last Modified: Oct 01, 2026
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
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, 17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 17.5.1.5, 17.5.1.6, 21.1.0
Fixed In:
21.1.0.1, 21.0.0.3, 17.5.1.8, 17.1.3.4
Opened: Apr 16, 2026 Severity: 2-Critical
In some instances, TMSH may experience a segmentation fault if a thread is not properly cancelled
TMSH would crash without any immediate indication as to why
The crash was intermittent, but in certain situations, when a thread was improperly cancelled, TMSH could crash
None
Fixed an intermittent crash that could happen during process shutdown