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Linux Distros Unpatched Vulnerability : CVE-2026-55892

medium Nessus Plugin ID 323734

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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 9.2.0662, the dump_prefixes() function in src/spell.c walks a spell-file prefix trie iteratively with a depth counter while dumping the prefixes that apply to a word. The counter is bounded only by the trie structure itself; it is never checked against the size of the fixed MAXWLEN-element stack arrays it indexes (prefix[], arridx[], curi[]). A crafted .spl file, loaded when the user dumps the word list, can drive the descent arbitrarily deep, so the function writes past the end of those arrays. This is a stack out-of-bounds write that corrupts the call frame and crashes the editor. This vulnerability is fixed in 9.2.0662. (CVE-2026-55892)

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-2026-55892

https://security-tracker.debian.org/tracker/CVE-2026-55892

https://ubuntu.com/security/CVE-2026-55892

Plugin Details

Severity: Medium

ID: 323734

File Name: unpatched_CVE_2026_55892.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 6/30/2026

Updated: 7/6/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.14

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-55892

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5.1

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:centos:centos:7, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:11.0, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:vim, p-cpe:/a:centos:centos:vim-common, p-cpe:/a:centos:centos:vim-data, p-cpe:/a:centos:centos:vim-enhanced, p-cpe:/a:centos:centos:vim-filesystem, p-cpe:/a:centos:centos:vim-minimal, p-cpe:/a:centos:centos:vim-x11, p-cpe:/a:centos:centos:vim, p-cpe:/a:centos:centos:xxd, p-cpe:/a:debian:debian_linux:vim, p-cpe:/a:redhat:enterprise_linux:vim-common, p-cpe:/a:redhat:enterprise_linux:vim-data, p-cpe:/a:redhat:enterprise_linux:vim-enhanced, p-cpe:/a:redhat:enterprise_linux:vim-filesystem, p-cpe:/a:redhat:enterprise_linux:vim-minimal, p-cpe:/a:redhat:enterprise_linux:vim-x11, p-cpe:/a:redhat:enterprise_linux:vim, p-cpe:/a:redhat:enterprise_linux:xxd

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: 6/25/2026

Reference Information

CVE: CVE-2026-55892