Microsoft fixes game and app crashes caused by AC-3 decoding bug in Windows 11 KB5124010 preview update
Microsoft has fixed a known issue in which games and Windows 11 apps using AC-3 (Dolby Digital) audio decoding crashed after the September 2026 optional preview update KB5124010. The fix is included in the October 2026 Patch Tuesday update KB5127648, which Microsoft advises installing on affected systems running Windows 11 24H2 and later. The preview update installs automatically only on devices with "Get the latest updates as soon as they're available" enabled. This is a reliability bug with no security impact, and the article reports no exploitation or threat activity.
Detalhes técnicos
- Affected applications could fail to launch, close without warning, or crash when certain features, such as music playback, were used.
- Affected software includes games, media players and some productivity applications.
- Modern apps that bring their own audio decoding components rather than using the built-in legacy AC-3 codec are generally not affected.
- The article notes that in September Microsoft also released emergency updates for a separate USB audio bug linked to the KB5124008 and KB5124012 security updates.
Remediação
- Install the October 2026 Patch Tuesday update KB5127648 on Windows 11 24H2 and later systems.
Linha do tempo
-
Microsoft fixes game and app crashes caused by AC-3 decoding bug in Windows 11 KB5124010 preview update
ler a análise desta fonte ocultar
Microsoft has fixed a known issue in which games and Windows 11 apps using AC-3 (Dolby Digital) audio decoding crashed after the September 2026 optional preview update KB5124010. The fix is included in the October 2026 Patch Tuesday update KB5127648, which Microsoft advises installing on affected systems running Windows 11 24H2 and later. The preview update installs automatically only on devices with "Get the latest updates as soon as they're available" enabled. This is a reliability bug with no security impact, and the article reports no exploitation or threat activity.
Technical Details
- Affected applications could fail to launch, close without warning, or crash when certain features, such as music playback, were used.
- Affected software includes games, media players and some productivity applications.
- Modern apps that bring their own audio decoding components rather than using the built-in legacy AC-3 codec are generally not affected.
- The article notes that in September Microsoft also released emergency updates for a separate USB audio bug linked to the KB5124008 and KB5124012 security updates.
Remediation
- Install the October 2026 Patch Tuesday update KB5127648 on Windows 11 24H2 and later systems.