PatchTheCVECVE-2026-31771: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: move wake reason st
CVE-2026-31771 is a high-severity flaw (CVSS 8.1) affecting linux kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: move wake reason storage into validated event handlers hci_store_wake_reason() is called from hci_event_packet() immediately after stripping the HCI event header but before hci_event_func() enforces the per-event minimum payload length from hci_ev_table. This means a short HCI event frame can reach bacpy() before any bounds check runs. Rather than duplica
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.1 (High) |
| Attack vector | Adjacent network |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 76%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2026-05-01 |
| Last modified | 2026-10-21 |
Last updated 2026-10-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-31771?
linux kernel: upgrade to 6.19.12. Exact commands for each OS are on this page.
Is CVE-2026-31771 being exploited?
CVE-2026-31771 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-31771 affect?
CVE-2026-31771 affects linux kernel. Severity is high (CVSS 8.1). In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: move wake reason storage into validated event handlers hci_store_wake_reason() is called from hci_event_packet() immediately after stripping the HCI
How urgent is CVE-2026-31771?
Priority 39/100. High severity; On your watchlist
Software pages
Linux kernel vulnerabilities · Bluetooth vulnerabilities
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