Last Modified: Aug 19, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
17.5.0
Fixed In:
17.5.1
Opened: Feb 28, 2025 Severity: 1-Blocking
TMM or system services may restart unexpectedly due to memory pressure. In /var/log/tmm: warning tmm[24255]: 01260013:4: SSL Handshake failed for TCP 10.20.2.115:44404 -> 10.20.40.191:443 err tmm[24255]: 01230140:3: RST sent from 10.20.40.191:443 to 10.20.2.115:44404, [0x3076761:2571] SSL handshake timeout exceeded err tmm3[24255]: 01010282:3: Crypto codec error: sw_crypto-3 RSA private encrypt error OpenSSL error:03078069:bignum routines:BN_EXPAND_INTERNAL:expand on static bignum data err tmm2[24255]: 01010282:3: Per-invocation log rate exceeded; throttling. err tmm6[24255]: 01010282:3: Resuming log processing at this invocation; held 53 messages.
Traffic disrupted while tmm restarts.
Cipher rule DH group X25519KYBER768 is enabled.
There is no workaround, disable X25519KYBER768 to mitigate the issue.
Fix memory issues.