Description
In the Linux kernel, the following vulnerability has been resolved:
sched_ext: Don't BUG_ON a destroyed DSQ in process_deferred_reenq_users
scx_bpf_dsq_reenq() queues a deferred reenq (dru) that runs from run_deferred(), not ops.dispatch(). If the DSQ is destroyed before the dru runs, process_deferred_reenq_users() sees dsq->id == SCX_DSQ_INVALID and hits the BUG_ON. destroy_dsq() doesn't flush pending drus, so just skip.
tj: Read dsq->id once with READ_ONCE(). Reading it separately in the INVALID check and the BUG_ON would leave a window where destroy_dsq() can invalidate the id between the two reads and still trigger the BUG_ON.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 84b1a0ea0b7c23dec240783a592e480780efe459, < c480961a1e790b46ffd8c20c4b6754d65ec6572d; >= 84b1a0ea0b7c23dec240783a592e480780efe459, < 8d8dd8ae89eaa78b37fc85528e926029f5facbdf |
| Linux | Linux | 7.1 |
References
Timeline
- Published
- Sep 11, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received