Samsung Galaxy S24 Series Receives October 2026 Security Update Fresh After One UI 9

Samsung is keeping its maintenance engine running at full speed. Just weeks after pushing out the major stable One UI 9 update based on Android 17, the tech giant has officially initiated the rollout of its October 2026 security patch for the entire Galaxy S24 lineup.

While the recent One UI 9 upgrade brought dramatic feature changes, overhauled health dashboards, and deeper system customization, this follow-up build focuses on hardening core system defenses and stabilizing device performance.

What’s Included in the October 2026 Build?

The latest maintenance package covers all four models in the 2024 flagship family: the Galaxy S24, S24+, S24 Ultra, and S24 FE.

Arriving with a build number ending in EZJ1, this update acts as a critical stability patch following the major Android 17 platform jump.

Galaxy S24 Series October 2026 Update Overview
 ├── Models Covered   ──> Galaxy S24, S24+, S24 Ultra, S24 FE
 ├── Build Number     ──> Ending in EZJ1
 ├── Flaws Addressed  ──> 76 Total Vulnerabilities (CVEs & SVEs)
 └── Initial Market   ──> South Korea (Staggered Global Expansion)

Key highlights of the update package include:

• 76 Total Vulnerabilities Patched: Addresses a wide combination of security flaws identified across core Android operating system components and Samsung’s custom software suite.

• Critical Threat Mitigation: Includes essential patches for potential memory exposure vulnerabilities, system permission bypasses, and wireless connectivity exploits.

• Post-One UI 9 Polish: Ensures smooth background performance, optimized battery drain, and app stability following the recent shift to Android 17.

Rollout Status and Regional Availability

As is standard for Samsung’s security distributions, the firmware release follows a phased rollout model:

• South Korea First: Home-market users in South Korea are receiving the initial build directly over-the-air (OTA).

• Global Expansion: Unlocked and carrier-branded variants across Europe, Asia, and Latin America are expected to follow in rapid succession as carrier certification clears.

• United States Timeline: US release timing for the Galaxy S24 family remains unconfirmed at the moment. Interestingly, Samsung’s newer flagship family—the Galaxy S25 series—has already begun receiving the October patch in North America, signaling that S24 models should receive approval shortly.

Context: Following Up on the One UI 9 Wave

This security release comes immediately on the heels of one of Samsung’s largest software pushes of the year. To catch up on how Samsung transitioned its 2024 flagships onto the Android 17 base, read our full breakdown on Samsung’s One UI 9 update rollout on NokiaPowerUser.

Having already moved through the initial One UI 9 feature deployment, these monthly security releases ensure that all newly introduced capabilities remain fully secure against emerging software threats.

How to Check for Update EZJ1 on Your Device

If you own a Galaxy S24 series smartphone, you can check whether build EZJ1 has reached your region by following these steps:

1. Open the Settings app on your Galaxy phone.

2. Scroll down and tap Software update.

3. Select Download and install.

Settings 
 └── Software update 
      └── Download and install

(Note: Always ensure your device has at least 50% battery remaining or is connected to a charger before beginning any system firmware install).

Stay tuned for more updates as Samsung expands the October patch to additional global markets and US carrier networks!