CVE-2026-53166: futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock
CSIRTS triage
- What
- This vulnerability prevents NULL pointer dereference in remove_waiter() on self-deadlock.
- Who is affected
- Users of affected futex implementations are at risk.
- Urgency
- Medium urgency for remediation due to a CVSS score of 5.5 and potential impact.
- Action
- Apply relevant updates to futex implementations to fix this issue.
AI-assisted analysis generated from the source advisory — verify against the original.
Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53166
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-531660.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-53166 | coverage & exploitation status | NVD · CVE.org |
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