Linux Distros Unpatched Vulnerability : CVE-2026-52859

medium Nessus Plugin ID 320674

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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.

- Vim is an open source, command line text editor. Prior to version 9.2.0565, the update_snapshot() function in src/terminal.c copies the visible terminal screen into the scrollback buffer when a snapshot is taken.
For each screen cell it walks the cell's chars[] array with no upper bound, stopping only when it encounters a NUL terminator. When a cell legitimately fills all VTERM_MAX_CHARS_PER_CELL (6) slots a base character plus five combining marks the bundled libvterm returns the array without a terminating NUL, so the loop reads past the fixed six-element array and appends the out-of-bounds values to a buffer reserved for only six characters. A program whose output is rendered inside a :terminal window can trigger this with a short byte sequence and no Vim scripting, leading to a crash. This issue has been patched in version 9.2.0565. (CVE-2026-52859)

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

Solution

There is no known solution at this time.

Plugin Details

Severity: Medium

ID: 320674

File Name: unpatched_CVE_2026_52859.nasl

Version: 1.8

Type: Local

Agent: unix

Family: Misc.

Published: 6/11/2026

Updated: 6/22/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 52.03

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 7.2

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

CVSS Score Source: CVE-2026-52859

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.5

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:vim-enhanced, p-cpe:/a:centos:centos:vim-x11, p-cpe:/a:redhat:enterprise_linux:xxd, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:vim, p-cpe:/a:centos:centos:vim-minimal, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:vim, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:vim-filesystem, p-cpe:/a:redhat:enterprise_linux:vim-common, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:vim-minimal, p-cpe:/a:centos:centos:vim-enhanced, p-cpe:/a:centos:centos:vim-data, p-cpe:/a:redhat:enterprise_linux:vim-x11, p-cpe:/a:centos:centos:xxd, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:vim-common, p-cpe:/a:centos:centos:vim, p-cpe:/a:redhat:enterprise_linux:vim-filesystem, p-cpe:/a:redhat:enterprise_linux:vim-data

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 6/11/2026

Reference Information

CVE: CVE-2026-52859

Detections

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