FreeBSD : Erlang/OTP -- remote crash via gen_tcp with {packet,4} (62b56853-a609-11f1-9195-4c526214c986)

high Nessus Plugin ID 342356

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 62b56853-a609-11f1-9195-4c526214c986 advisory.

The OTP 29.0.6 release notes report:
A gen_tcp socket using the inet driver and {packet,4} had a bug if receiving a packet with size just below INT_MAX.
That packet size wrapped in size calculations and made the received data overwrite its allocation and trash allocator metadata and subsequent block(s), causing the VM to crash.
This made it possible for anyone to remotely crash an Erlang node that used {packet,4} on a reachable socket.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 342356

File Name: freebsd_pkg_62b56853a60911f191954c526214c986.nasl

Version: 1.1

Type: Local

Family: FreeBSD Local Security Checks

Published: 9/2/2026

Updated: 9/2/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.16

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-75538

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:erlang-runtime27, p-cpe:/a:freebsd:freebsd:erlang-runtime28, p-cpe:/a:freebsd:freebsd:erlang-runtime29, p-cpe:/a:freebsd:freebsd:erlang

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 9/1/2026

Vulnerability Publication Date: 9/1/2026

Reference Information

CVE: CVE-2026-75538

Detections

Analytics