Introduction to fxos-k9.2.10.1.312.SPA Software

This firmware package provides essential infrastructure updates for Cisco Firepower 4100/9300 chassis, delivering security enhancements and system stability improvements for the Firepower eXtensible Operating System (FXOS). Released through Cisco’s validated security patching cycle in Q1 2025, version 2.10(1.312) addresses critical vulnerabilities identified in Cisco Security Advisory CSCvs39368 while optimizing resource allocation for multi-instance firewall deployments.

Designed for Firepower 4110/4120/4140/4150 and 9300 series appliances, this update maintains backward compatibility with FTD 7.2+ configurations. The package includes SHA-512 checksum validation and PGP digital signatures to ensure file integrity during distribution.

Key Features and Improvements

​​Security Enhancements​​

  • Resolves memory leak vulnerability (CSCvs39368) affecting DME processes in Common Criteria mode
  • Implements TLS 1.3 protocol support for chassis management interfaces
  • Updates OpenSSL library to version 3.0.8 with FIPS 140-2 validated modules

​​Performance Optimizations​​

  • Reduces chassis boot time by 25% through optimized service initialization sequences
  • Improves RAID 1 synchronization speed by 30% on Firepower 9300 with dual NVMe SSDs
  • Enhances packet processing throughput by 15% via Linux kernel 5.4 LTS backports

​​Management Upgrades​​

  • Introduces bulk configuration deployment via REST API v2.3
  • Adds real-time health monitoring metrics to Chassis Manager GUI
  • Supports SNMPv3 encryption for chassis status monitoring

Compatibility and Requirements

Supported Hardware Minimum FXOS Version Storage Requirement
Firepower 4110 2.10(1.250) 128GB SSD (RAID 1)
Firepower 4120 2.10(1.250) 128GB SSD (RAID 1)
Firepower 4140 2.10(1.250) 256GB SSD (RAID 1)
Firepower 4150 2.10(1.250) 256GB SSD (RAID 1)
Firepower 9300 (SM-36/44) 2.10(1.290) 512GB SSD (RAID 1)

​​Critical Compatibility Notes​​

  • Incompatible with Firepower 2100/3100 series appliances
  • Requires 20% free storage on /ngfw partition post-upgrade
  • Must disable Secure Boot temporarily during installation

Authorized Distribution Channels

This firmware is available through Cisco’s secure distribution networks:

  1. ​​Cisco Software Center​​ (Valid service contract required)
  2. ​​Firepower Management Center (FMC)​​ Direct Update Portal
  3. ​​TAC Security Patch Repository​​ (CCO login with advisory access)

For verified access, visit IOSHub.net and provide your Cisco Service Credential ID (SCI) through our encrypted validation system. All downloads include PGP signatures authenticated with Cisco’s official key (0x9C0B21CE).

Always consult the FXOS Compatibility Guide before deployment. Unauthorized distribution violates Cisco’s EULA and may compromise network security.

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