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CVE-2026-27815

Linuxfoundation Everest buffer overflow

9.1 CRITICALEPSS 0.34%
  1. Published26 Mar 2026

Description

EVerest is an EV charging software stack. Prior to versions to 2026.02.0, ISO15118_chargerImpl::handle_session_setup copies a variable-length payment_options list into a fixed-size array of length 2 without bounds checking. With schema validation disabled by default, oversized MQTT Cmd payloads can trigger out-of-bounds writes and corrupt adjacent EVSE state or crash the process. Version 2026.02.0 contains a patch.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

Linuxfoundation Everest< 2026.02.0

Remediation

Fixed in
Linuxfoundation Everest≥ 2026.02.0

References

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Frequently asked

Is CVE-2026-27815 being actively exploited?

CVE-2026-27815 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.34%.

How severe is CVE-2026-27815?

CVE-2026-27815 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.34% probability of exploitation.

Which products are affected by CVE-2026-27815?

Affected products include Linuxfoundation Everest.

How do I fix CVE-2026-27815?

Upgrade affected software to a fixed version, for example Linuxfoundation Everest 2026.02.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.