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Linux Distros Unpatched Vulnerability : CVE-2025-26603

medium Nessus Plugin ID 256844

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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 a greatly improved version of the good old UNIX editor Vi. Vim allows to redirect screen messages using the `:redir` ex command to register, variables and files. It also allows to show the contents of registers using the `:registers` or `:display` ex command. When redirecting the output of `:display` to a register, Vim will free the register content before storing the new content in the register. Now when redirecting the `:display` command to a register that is being displayed, Vim will free the content while shortly afterwards trying to access it, which leads to a use-after-free. Vim pre 9.1.1115 checks in the ex_display() function, that it does not try to redirect to a register while displaying this register at the same time. However this check is not complete, and so Vim does not check the `+` and `*` registers (which typically donate the X11/clipboard registers, and when a clipboard connection is not possible will fall back to use register 0 instead. In Patch 9.1.1115 Vim will therefore skip outputting to register zero when trying to redirect to the clipboard registers `*` or `+`. Users are advised to upgrade. There are no known workarounds for this vulnerability. (CVE-2025-26603)

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-2025-26603

https://security-tracker.debian.org/tracker/CVE-2025-26603

Plugin Details

Severity: Medium

ID: 256844

File Name: unpatched_CVE_2025_26603.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 8/27/2025

Updated: 11/22/2025

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

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2025-26603

CVSS v3

Risk Factor: Medium

Base Score: 4.2

Temporal Score: 3.9

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

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 2/18/2025

Reference Information

CVE: CVE-2025-26603