CVE-2026-89516
CVE CVE-2026-89516EUVD EUVD-2026-76422Published 2026-09-11T19:43:59.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 0; 84b1a0ea0b7c23dec240783a592e480780efe459 <8d8dd8ae89eaa78b37fc85528e926029f5facbdf; patch: 7.3-rc1; patch: 7.2.4; 7.1; 84b1a0ea0b7c23dec240783a592e480780efe459 <c480961a1e790b46ffd8c20c4b6754d65ec6572d
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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