---
id: "CVE-2026-129432"
page: "https://infrastack.ai/live/CVE-2026-129432"
kind: "vulnerability"
aliases: ["CVE-2026-129432"]
title: "Ettercap: heap out-of-bounds read in MOUNT dissector leaks memory"
severity: "high"
cvss: 7.1
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "ettercap", "fixed": [], "affected": "<= 0.8.5.1", "ecosystem": "vendor"}]
ecosystems: []
tags: ["ettercap", "linux", "network-security", "other", "self-hosted"]
not_affected_if: ["ettercap-not-installed", "no-live-capture", "version-above-0.8.5.1"]
published_at: "2026-11-14T13:17:22+00:00"
first_seen_at: "2026-11-14T13:28:10+00:00"
updated_at: "2026-11-14T13:30:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-129432", "first_seen_at": "2026-11-14T13:28:10+00:00"}, {"source": "analyst", "url": "https://github.com/Ettercap/ettercap/pull/1341", "first_seen_at": "2026-11-14T13:30:36+00:00", "cites": ["https://github.com/Ettercap/ettercap/pull/1341", "https://github.com/Ettercap/ettercap/releases"]}]
exploit_sources: []
---

# Ettercap: heap out-of-bounds read in MOUNT dissector leaks memory

Link for people: https://infrastack.ai/live/CVE-2026-129432 (this .md is for agents)

Ettercap through 0.8.5.1 has a heap out-of-bounds read in its MOUNT RPC dissector, where credential and directory lengths are checked separately instead of against the packet end. A network-adjacent attacker sending a crafted MOUNT MNT call can leak up to 100 bytes of heap memory to the console and logs.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:ettercap affected <= 0.8.5.1 fixed no fixed version listed

## How to check

- Run ettercap --version; 0.8.5.1 and earlier are affected, and no fixed release is known yet.
- Check where Ettercap runs (sniffing or MITM test hosts) and whether it sees NFS MOUNT (RPC mountd) traffic from untrusted hosts on the segment.
- Also check distro packages: they track the same upstream code.

## Fix

No released fix found: latest release 0.8.5.1 is affected. Fix PR #1341 (bound every read in dissector_mountd() against the packet end) is closed and not confirmed merged; watch the Ettercap repo for a release after 0.8.5.1.

## Timeline

- 2026-11-14T13:28:10+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-129432
- 2026-11-14T13:30:36+00:00 analyst https://github.com/Ettercap/ettercap/pull/1341 — VulnCheck advisory read (affects <=0.8.5.1, credit stilwel/Emilio Escobar). Fix PR #1341 (bounds every mountd read against packet end; ASAN-verified in the PR) shows state closed, not clearly merged to master, and the latest release 0.8.5.1 (10 Nov) predates it. So no released fix found. Not checked: whether the dissector is on by default; no vendor advisory page yet. PoC: none public. No X search done (low-profile CVE).

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/ettercap-through-0.8.5.1-heap-out-of-bounds-read-in-nfs-mountd-dissector
- [fix] PR #1341: Bound every read in the mountd dissector against the packet (closed) https://github.com/Ettercap/ettercap/pull/1341
- [mentions] Ettercap releases (latest 0.8.5.1) https://github.com/Ettercap/ettercap/releases

## From the sources

Ettercap through 0.8.5.1 contains a heap out-of-bounds read vulnerability in dissector_mountd() in src/dissectors/ec_mountd.c that validates RPC credential and directory lengths independently rather than against the packet end. Network-adjacent attackers can send a crafted MOUNT MNT call to read up to 100 bytes past the heap buffer, leaking memory to the console and logs.

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