Where does the bug appear (feature/product)? Cursor IDE Describe the Bug Permission bits on the cursor-sandbox binary are missing the setuid bit. -rwxr-xr-x 1 root root 2.8M Dec 18 22:41 /usr/share/cursor/resources/app/resources/helpers/cursor-sandbox* Requires: sudo chmod 4755 /usr/share/cursor…

Yes, I tried this today. The following profile worked for me: ~/ cat /etc/apparmor.d/cursor-system abi <abi/4.0>, include <tunables/global> profile cursor-system “/usr/share/cursor/cursor” flags=(unconfined) { userns, include if exists <local/cursor> }

Hey @Aaron_Smith Thanks for the investigation over here: [image] "Activating Extensions" message, extensions don't work -- solution Guides Where does the bug appear (feature/product)? Cursor IDE Describe the Bug Extensions wouldn’t start because of a problem…

@Aaron_Smith could you give v2.3 a try? I would try it out myself, but being home for Christmas has not granted me great wi-fi to download an Ubuntu ISO. :slight_smile:

@Colin The link to the 2.3 x64 deb package actually links to the 2.2.43 version I’m already running: https://downloads.cursor.com/production/32cfbe848b35d9eb320980195985450f244b303d/linux/x64/deb/amd64/deb/cursor_2.2.43_amd64.deb

Hey @Aaron_Smith Sorry about that. 2.3 is announced but still rolling out slowly (and we’ve had a few misfires on updating the downloads page). It should be available soon. :folded_hands:

The setuid bit is still missing in 2.2.44 Version: 2.2.44 VSCode Version: 1.105.1 Commit: 20adc1003928b0f1b99305dbaf845656ff81f5d0 Date: 2025-12-24T21:41:47.598Z Electron: 37.7.0 Chromium: 138.0.7204.251 Node.js: 22.20.0 V8: 13.8.258.32-electron.0 OS: Linux x64 6.17.0-8-generic ~/ ll /usr/…

@Aaron_Smith If you could, try setting your update track (Cursor Settings > Beta) to Early Access, which should get you 2.3.

Thank you, @Colin . I downloaded the deb package and installed it: Version: 2.3.10 VSCode Version: 1.105.1 Commit: af6d64e4848e6185e482a2de5bac040191c8d790 Date: 2025-12-29T03:56:22.219Z Electron: 37.7.0 Chromium: 138.0.7204.251 Node.js: 22.20.0 V8: 13.8.258.32-electron.0 OS: Linux x64 6.17…

Thanks for the update @Aaron_Smith , and the feedback! In the meantime, some users have been successful in defining their own AppArmor profile. Have you tried it? ( github )

`cursor-sandbox` binary missing setuid bit breaks extensions

Support Bug Reports

Colin (Colin) December 23, 2025, 8:42pm 3

Hey @Aaron_Smith

Thanks for the investigation over here:

I’ve flagged this for the team!

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`cursor-sandbox` binary missing setuid bit breaks extensions

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