CVE-2025-21969
CSIRTS triage
- What
- A use-after-free vulnerability in the Bluetooth L2CAP layer allows reading from freed memory during command transmission.
- Who is affected
- Systems with Bluetooth enabled and L2CAP protocol in use across affected kernel versions.
- Urgency
- High severity with memory corruption risk; immediate patching recommended despite no current exploitation reports.
- Action
- Update to a patched Linux kernel version that fixes the l2cap_send_cmd use-after-free condition.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 12% of all EPSS-scored CVEs.
Advisory coverage (1)
- highCVE-2025-21969: Bluetooth: L2CAP: Fix slab-use-after-free Read in l2cap_send_cmdmsrc · 2026-08-06
External references
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