Bug ID 827133: TMM crash due to failed assertion 'sp->slab_cache == ((umem_cache_t *)(((char *)(&(ccp)[-((ccp)->cc_td)])) - __builtin_offsetof(umem_cache_t, cache_cpu)))'

Last Modified: Mar 02, 2026

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

Known Affected Versions:
14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 14.1.5.3, 14.1.5.4, 14.1.5.6

Opened: Sep 16, 2019

Severity: 2-Critical

Symptoms

TMM crashes.

Impact

Traffic disrupted while tmm restarts.

Conditions

Exact conditions are not yet known. It is suspected it is related to using APM and/or SAML authentication protocol.

Workaround

None.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips