Use-after-free via authorization timer callback race
Published Mar 26, 2026 · Updated Mar 26, 2026
Use-after-free in EVerest Core before 2026.02.0 allows physically proximate attackers to trigger unsafe memory access through charging events. AuthHandler resets or stops EVSEContext::timeout_timer from multiple event paths while Everest::Timer::timeout writes its callback without synchronization as the timer thread executes it. A high-complexity sequence of plug, unplug, and authorization events is required; the published reproducer reaches an ASAN crash during test teardown, while a production EVSE outcome is undocumented.
Summary
What happened
Use-after-free in EVerest Core before 2026.02.0 allows physically proximate attackers to trigger unsafe memory access through charging events. AuthHandler resets or stops EVSEContext::timeout_timer from multiple event paths while Everest::Timer::timeout writes its callback without synchronization as the timer thread executes it. A high-complexity sequence of plug, unplug, and authorization events is required; the published reproducer reaches an ASAN crash during test teardown, while a production EVSE outcome is undocumented.
The record
- CVE
- CVE-2026-27813
- Published
- Mar 26, 2026
- Updated
- Mar 26, 2026
- Vendor
- EVerest
- Product
- EVerest Core
- Classifications
- CWE-416
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 26, 2026CVE publishedPublication date reported by the CVE source.
- Mar 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 2026.02.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Vendor sanitizer race reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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