Any avatar can freeze another resident's moving vehicle by selecting it in edit mode (regression of SVC-34)
closed
Cahtias Resident
Selecting a physical vehicle that another resident is driving — by entering edit mode (Ctrl-3) and clicking it, or by right-clicking it so the context menu opens — stops the vehicle dead for as long as the selection is held. The selecting avatar needs no permissions on the object: not owner, not group, no modify rights. On deselect the vehicle resumes from zero velocity.
This is being used (accidentally and otherwise) to disrupt organized racing: a spectator right-clicking a passing car to inspect it halts that car mid-lap.
The same behavior was reported as SVC-34 ("Right-clicking another Resident's moving object freezes it") and listed as fixed in server release 11.09.23.241511, alongside "Anybody can freeze an unscripted physical object." The edit-mode selection path still reproduces in 2026. Linden Lab's own QA test script acknowledges it — Object Selection Test, "Select other's vehicles": "verify you can select other's vehicles and their vehicle stops. Unfortunate." (page last edited October 2013).
No script-side mitigation exists: STATUS_BLOCK_GRAB does not affect selection (and the same test page notes it doesn't work anyway), the Locked checkbox only restricts the owner, and disabling Build on the parcel does not block selection.
## Steps to reproduce
- Avatar A rezzes any physical scripted vehicle (a Linden Vehicle Tutorial car is sufficient), sits, and drives it in a straight line at steady speed.
- Avatar B, who does not own the vehicle and has no modify rights, presses Ctrl-3 to enter edit mode and clicks the moving vehicle.
- Observe: the vehicle stops immediately and stays stopped while B holds the selection.
- B presses Esc to deselect. Observe: the vehicle resumes from zero and re-accelerates.
- Repeat with B right-clicking the vehicle instead of using Ctrl-3. Observe the same stop while the context menu is open.
## Expected behavior
Selecting an object you cannot modify should not alter its simulation. Physics should only be suspended for a selection by an agent who has modify rights on the object (owner, or group with appropriate permissions), and ideally only when that agent begins an edit operation.
## Actual behavior
Physics is suspended for any selection, regardless of the selecting agent's permissions on the object.
## Environment
- Region: [fill in region name and server version from Help > About]
- Viewer: [fill in viewer and version — reproduces with Second Life Viewer and Firestorm]
- Date observed: [fill in]
## References
- Object Selection Test (SL Wiki, LL QA test script): https://wiki.secondlife.com/wiki/Object_Selection_Test
- Server release notes 11.09.23.241511 listing SVC-34 as fixed: https://wiki.secondlife.com/wiki/Release_Notes/Second_Life_Server/11
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Maestro Linden
updated the status to
closed
Closing as we have not received the requested details.
Maestro Linden
updated the status to
needs info
Maestro Linden
Hi Cahtias Resident, I'm not able to reproduce this in general with Second Life Server 2026-08-03.30838755483. Testing with "Kart 1.0" from Library, I'm seeing the expected behavior - that a vehicle is frozen by selection
if and only if
the selecting agent has the ability to return the vehicle.Some cases in which 'Return' would be available to the selecting agent include:
- Selecting agent is an estate manager
- Selecting agent can manage the parcel (owns the parcel or has powers via group permissions)
- Selecting agent has been granted 'permission to edit my objects' by the vehicle owner
- Vehicle has 'Share with group' enabled and the selecting agent is a member of that group
- Vehicle has 'Anyone can move' enabled
Are you able to rule out these cases? I recommend testing at a location like https://maps.secondlife.com/secondlife/Suduffco/167/43/2 for testing, to rule out conditions (1) and (2). You'll need to look at the specific settings to rule out (3) - (5).
If you're still seeing the 'freeze' behavior and can't explain it via other options, we'll need more details:
- Which specific agent is the vehicle owner/driver, and which agent is the selector? If you reverse the roles, does it still reproduce?
- Is the selecting agent able to return the vehicle if that select that option from the context menu?