Modern Warfare 4 patch fixes DMZ and multiplayer bugs on all platforms

Activision has released a patch for Call of Duty: Modern Warfare 4, dated 24 October 2026, that targets stability, bugs and exploits in Multiplayer and DMZ. The update is available on all platforms and arrives shortly after the game’s launch.

On Nintendo Switch 2, players say the update requires a download of around 30GB. Activision had not put out an official notice about it when the patch first appeared, and the patch notes were published afterward, describing it as a “small update”.

What the patch changes

Globally, Activision lists fixes for several stability and crash issues. Interface fixes include DMZ Stash options appearing in the middle of the screen, front end menus closing unexpectedly, and a PC bug where the Split keybind did not follow a custom Ping keybind. Another fix stops some weapon camos or reticles in DMZ Gunsmith from deducting DMZ cash.

In Multiplayer, Activision improved spawn locations and respawn timing in Hijack. Other fixes cover:

• the Portable Radar Field Upgrade not showing the Minimap in Hardcore matches
• players being able to defuse the bomb from an unintended distance or position in Search and Destroy
• the Deathstalker Killstreak leaving the map boundaries on Rooftops
• Favorite Operators not being equipped in Collateral

DMZ gets the longest list. Activision says it fixed more spots on Hajin where players could get stuck in rocks, and an issue where Party Leaders could pull teammates out of DMZ without consent, which left their Active Duty Operators marked as MIA. It also fixed the Exfil helicopter disappearing with players still inside, AI reinforcements spawning too often during the Shopping Mission, and wrong data on looted Dog Tags and Bounties. The studio also says it closed various exploits.

Activision lists three known issues:

• The regional map animation shown while searching for lobbies is temporarily disabled as part of a prospective fix for hitching reports.
• Some players are being kicked while spectating in Multiplayer, which the studio is investigating.
• Players on PC may get a network error when extracting in DMZ with a looted Dog Tag.

The notes also mention a fix for player models appearing in static or incorrect animations, which may leave enemy players in unintended states, plus stability and crash fixes for PC.

Why it matters

The Switch 2 version needs about 91GB of system space with Multiplayer, Campaign and DMZ installed. The console has 256GB of internal storage and supports microSD Express cards, so a 30GB patch takes a sizable share of the built-in space. Large patches are common for the Call of Duty series, and Activision has taken steps in the past to reduce file sizes.

The update comes a day after Modern Warfare 4 launched, and it focuses on bugs that affect progression and loadouts in DMZ, along with match flow in Multiplayer. The known-issues list shows that some problems, including the hitching and spectator kicks, remain unresolved.

What we don’t know yet

The 30GB figure for Switch 2 comes from player reports, and Activision has not stated the download size for any platform.