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Linux Distros Unpatched Vulnerability : CVE-2026-45232

low Nessus Plugin ID 315598

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set. (CVE-2026-45232)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-45232

https://security-tracker.debian.org/tracker/CVE-2026-45232

Plugin Details

Severity: Low

ID: 315598

File Name: unpatched_CVE_2026_45232.nasl

Version: 1.11

Type: Local

Agent: unix

Family: Misc.

Published: 5/20/2026

Updated: 6/10/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.2

CVSS v2

Risk Factor: Low

Base Score: 2.6

Temporal Score: 2.2

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

CVSS Score Source: CVE-2026-45232

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.4

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

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

CVSS v4

Risk Factor: Low

Base Score: 2.1

Threat Score: 0.5

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:centos:centos:7, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:centos:centos:rsync-daemon, p-cpe:/a:redhat:enterprise_linux:rsync-daemon, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:rsync, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:6, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:rsync, p-cpe:/a:centos:centos:rsync-rrsync, p-cpe:/a:debian:debian_linux:rsync, p-cpe:/a:redhat:enterprise_linux:rsync-rrsync, cpe:/o:debian:debian_linux:12.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:debian:debian_linux:13.0

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 5/20/2026

Reference Information

CVE: CVE-2026-45232