Is there a public exploit for CVE-2026-90832?

No public exploit for CVE-2026-90832 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-90832?

CVE-2026-90832 scores CVSS 4.3 (v3.1), rated medium.

What does CVE-2026-90832 affect?

CVE-2026-90832 affects zephyrproject Zephyr.

4.3 Medium

bthcileperadvreportcommon() in subsys/bluetooth/host/scan.c handles the HCILEPeriodicAdvertisingReport (and v2) event.

CVE-2026-90832

bthcileperadvreportcommon() in subsys/bluetooth/host/scan.c handles the HCILEPeriodicAdvertisingReport (and v2) event. It verified that the fixed event header was present and that the controller-declared DataLength fits the tailroom of the periodic-sync reassembly buffer, but never checked that the event actually carried as many data bytes as evt->length claims. Both reassembly paths — DATASTATUSPARTIAL, and DATASTATUSCOMPLETE while a chain is already in progress — then called netbufsimpleaddmem(&peradvsync->reassembly, buf->data, evt->length), copying up to 255 bytes starting past the end of the event's real payload. The DataLength field originates in the HCI controller, so the flaw is reachable in host-only/split builds where the controller is a separate part reached over H4 UART, SPI, USB or an inter-core IPC transport: a malicious, compromised or buggy controller (or an attacker able to inject on that link) can send a report declaring a length larger than the event payload. The generic event dispatcher in subsys/bluetooth/host/hcicore.c only enforces a per-event minimum length and never cross-checks the subevent's internal length field, so nothing else catches it. Builds using…

Assessment

CVSS: 4.3 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 10 November 2026
Last updated: 10 November 2026
Affected: zephyrproject · Zephyr
Assigner: zephyr

CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

At the source

EUVD (ENISA)

References

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