Call of Duty: Modern Warfare 4 · All · version Launch (Oct 2026)Players can deliberately crash Multiplayer matches for the whole lobby
ConfirmedUnpatchedUpdated
Since about October 30, players in Modern Warfare 4 Multiplayer have reported opponents deliberately crashing matches, often when their side is losing. Players are using a sniper rifle's underbarrel drill charge to blow up proximity mines, which freezes the game for everyone in the match and throws the whole lobby out, so any progress from that match is lost. Reports and videos cover Search and Destroy and Ground War; a widely shared clip was recorded on PC, and other reports do not name a platform. On October 31 Infinity Ward added the issue to its Trello board of Multiplayer known issues and said through @CODUpdates that it is working on a fix, which it is now testing. Until then it asks players not to equip the attachment involved. That only stops a player from causing the crash: anyone caught in a lobby with someone abusing it has no way to prevent it beyond leaving the match.
Lifecycle
Acknowledged · stage 3 of 5
1day open
Since first report
- Reported (reached)
- Confirmed (reached)—
- Acknowledged (reached) · now
- Partial (not yet)next
- Patched (not yet)—
- Game
- Call of Duty: Modern Warfare 4
- Platform
- All
- Affected version
- Launch (Oct 2026)
- Kind
- Exploit
- Confirmation
- Confirmed
- Patch status
- Unpatched
- First reported
- Last updated
- Latest fix or workaround
- None on the record
How we label issues
Kind
- Exploit: Repeatable and clearly advantageous to the player using it; essentially cheating.
- Bug: Everything else: crashes, launch errors, broken features, visual or audio faults.
Confirmation
- Confirmed: A developer or official account acknowledged it, an official known-issues board lists it, it appears in official patch notes, or 100+ corroborating posts on X were actually counted.
- Unconfirmed: None of the above yet. Press articles are reports and never confirm an issue on their own.
Patch status
- Unpatched: Known and open; no fix has been claimed.
- Reported as unpatched: Players credibly report it persisting, including after a fix claim that never appeared in patch notes.
- Partially patched: Official patch notes list a fix, but credible later reports say it still happens, or the notes only cover part of it.
- Reported as patched: A developer, official account or player says it is fixed, but no official patch notes list it.
- Patched: Official patch notes (a Steam news post or the publisher's patch notes page) list the fix, and nothing credible says it still happens.
Active means still affecting players: Unpatched, Reported as unpatched or Partially patched. Patched and Reported as patched issues are closed.
Estimated impact runs from 0.1 to 9.9 with one decimal. xploitr sets it from the rubric below. Factors: advantage to other players, reach, play blocked or progress lost, frequency, and whether a reliable workaround exists. Patched issues keep their historical impact.
Signed-in community members can report new issues and suggest status changes, such as Fixed or Still unpatched, with their platform, version and a source. Every report and suggestion is reviewed by an editor before anything on the record changes. A new issue is published only when the report has at least three independent sources (distinct accounts, or distinct sites for web pages, after blocked sources are removed), unless the owner approved that issue by hand. Approved input appears as a dated Update from the xploitr community source on the issue's timeline, credited to the member's username (reports can opt out and stay anonymous); nothing is counted or published automatically.
Impact bands
- 0.1–2.9 Low: Cosmetic, audio, text and UI glitches with no effect on play.
- 3.0–4.9 Moderate: Narrow gameplay bugs or small exploits, rare or with a workaround.
- 5.0–6.9 Elevated: Bugs most players in a mode notice: hit registration, desync, balance-breaking damage.
- 7.0–8.4 High: Widely abused competitive or economy exploits; crashes many players hit.
- 8.5–9.9 Severe: Launch blockers, widespread progress or item loss, exploits that break the game for everyone.
Each issue has a dated timeline of updates (report, acknowledgement, announcement, fix, workaround). Update summaries are our own words; quotes and excerpts are the source's words, or our English translation when marked.
Updates · 13
- Report
Oct 30: a player reported another player crashing lobbies when losing and said they had video of it.
@NinjaJake6 on X ·
@NinjaJake6 on X · · View post
- Report
Oct 31: a player says a stranger joined their Ground War match and crashed it for the whole lobby.
@RayCanizales on X ·
@RayCanizales on X · · View post
- Report
Oct 31: a player asked Call of Duty to fix a bug that lets one player crash the entire server.
@v0iD72 on X ·
@v0iD72 on X · · View post
- Report
Oct 31: replying to @CODUpdates, a player asked for a fix after crashing a whole lobby.
@GetDeadKid on X ·
@GetDeadKid on X · · View post
- Report
Oct 31: a player called Multiplayer unplayable because matches keep being crashed by losing players.
@PrimalUrge66 on X ·
@PrimalUrge66 on X · · View post
- Report
Oct 31: a widely shared PC clip shows a Search and Destroy match freezing for everyone after one player's action.
@hoffylol on X ·
@hoffylol on X · · View post
- Report
Oct 31: a player asked Infinity Ward to pull the attachment behind the lobby crashes; Infinity Ward replied it was working on a solution.
@Its_SmittyVr on X ·
@Its_SmittyVr on X · · View post
- Acknowledged
Oct 31: replying to a player who reported lobbies being crashed, Infinity Ward said it was working on a solution.
@InfinityWard on X ·
@InfinityWard on X · · View post
- Acknowledged
Oct 31: Infinity Ward added the issue to its Multiplayer known-issues list, said a fix is in progress and asked players to leave the attachment unequipped for now.
Infinity Ward (Trello) on Trello ·
“We're working on a fix, but players should avoid equipping this attachment as a temporary workaround.”
Infinity Ward (Trello) on Trello · Open source - Acknowledged
Oct 31: Call of Duty Updates posted the same known-issue notice, pointing to the Trello card.
@CODUpdates on X ·
@CODUpdates on X · · View post
- Acknowledged
Oct 31: Infinity Ward said a fix was in testing and promised another update the same day.
@InfinityWard on X ·
@InfinityWard on X · · View post
- Report
Oct 31: a CoD news account called it a game-breaking MW4 bug that takes down the lobby.
@MJCoDIntel on X ·
@MJCoDIntel on X · · View post
- Report
Oct 31: a player said they would stop playing until the fix, since others keep crashing matches one after another.
@TheHypeIsMe on X ·
@TheHypeIsMe on X · · View post
Sources · 134 Official9 Community@InfinityWardOfficial+ 9 similar community reports and 3 official postsHide
Oct 31: replying to a player who reported lobbies being crashed, Infinity Ward said it was working on a solution.
Our summary of this post, not the author’s words.
- Infinity Ward (Trello) · TrelloOfficialOpen
“We're working on a fix, but players should avoid equipping this attachment as a temporary workaround.”
- @CODUpdatesOfficialView post
Oct 31: Call of Duty Updates posted the same known-issue notice, pointing to the Trello card. (Our summary of this post, not the author’s words.)
- @InfinityWardOfficialView post
Oct 31: Infinity Ward said a fix was in testing and promised another update the same day. (Our summary of this post, not the author’s words.)
- @NinjaJake6View post
Oct 30: a player reported another player crashing lobbies when losing and said they had video of it. (Our summary of this post, not the author’s words.)
- @RayCanizalesView post
Oct 31: a player says a stranger joined their Ground War match and crashed it for the whole lobby. (Our summary of this post, not the author’s words.)
- @v0iD72View post
Oct 31: a player asked Call of Duty to fix a bug that lets one player crash the entire server. (Our summary of this post, not the author’s words.)
- @GetDeadKidView post
Oct 31: replying to @CODUpdates, a player asked for a fix after crashing a whole lobby. (Our summary of this post, not the author’s words.)
- @PrimalUrge66View post
Oct 31: a player called Multiplayer unplayable because matches keep being crashed by losing players. (Our summary of this post, not the author’s words.)
- @hoffylolView post
Oct 31: a widely shared PC clip shows a Search and Destroy match freezing for everyone after one player's action. (Our summary of this post, not the author’s words.)
- @Its_SmittyVrView post
Oct 31: a player asked Infinity Ward to pull the attachment behind the lobby crashes; Infinity Ward replied it was working on a solution. (Our summary of this post, not the author’s words.)
- @MJCoDIntelView post
Oct 31: a CoD news account called it a game-breaking MW4 bug that takes down the lobby. (Our summary of this post, not the author’s words.)
- @TheHypeIsMeView post
Oct 31: a player said they would stop playing until the fix, since others keep crashing matches one after another. (Our summary of this post, not the author’s words.)