Bug ID 1848541: Invalid regular expression causing bd restart loop

Last Modified: Oct 15, 2025

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

Known Affected Versions:
17.1.2, 17.1.2.1, 17.1.2.2, 17.1.3

Opened: Mar 06, 2025

Severity: 3-Major

Symptoms

ASM (BD) restart loop /var/log/ts/bd.log contains events reporting PCRE compilation failure: ECARD|ERR |Jan 23 10:16:59.036|14826|regexp_table_management.cpp:0057|key crc f77c3b66 PCRE compilation failed at offset 3: PCRE does not support \L, \l, \N{name}, \U, or \u

Impact

Bd restart loop. ASM traffic disrupted while bd restarts.

Conditions

An invalid regular expression exists in a policy prior to upgrade.

Workaround

Clear out incorrect regular expressions from DCC.GLOBAL_PARAM_REG_EXPS Restart ASM or allow the device to restart. # tmsh restart sys service asm

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips