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Fencer Vulns
medium 5.4

CVE-2026-26269 json

Vim has a Netbeans specialKeys Stack Buffer Overflow

published 2026-02-13 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-7369

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

Vim is an open source, command line text editor. Prior to 9.1.2148, a stack buffer overflow vulnerability exists in Vim's NetBeans integration when processing the specialKeys command, affecting Vim builds that enable and use the NetBeans feature. The Stack buffer overflow exists in special_keys() (in src/netbeans.c). The while (*tok) loop writes two bytes per iteration into a 64-byte stack buffer (keybuf) with no bounds check. A malicious NetBeans server can overflow keybuf with a single specialKeys command. The issue has been fixed as of Vim patch v9.1.2148.

Patch / fix

  • vim vim 9.1.2148
  • vim Debian 13 2:9.1.1230-2+deb13u1
  • vim Debian 14 2:9.2.0119-1

debian advisories DEBIAN-CVE-2026-26269

  • vim Ubuntu 22.04 LTS 2:8.2.3995-1ubuntu2.26
  • vim Ubuntu 24.04 LTS 2:9.1.0016-1ubuntu7.10
  • vim Ubuntu 25.10 2:9.1.0967-1ubuntu6.1
  • vim Ubuntu 26.04 LTS 2:9.1.2141-1ubuntu2
  • vim Ubuntu Pro 14.04 LTS 2:7.4.052-1ubuntu3.1+esm23
  • vim Ubuntu Pro 16.04 LTS 2:7.4.1689-3ubuntu1.5+esm29
  • vim Ubuntu Pro 18.04 LTS 2:8.0.1453-1ubuntu1.13+esm14
  • vim Ubuntu Pro 20.04 LTS 2:8.1.2269-1ubuntu5.32+esm2

ubuntu advisories UBUNTU-CVE-2026-26269

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • vim SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +4 more 9.2.0110-150000.5.86.1
  • vim SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES 15 SP6-LTSS +7 more 9.2.0110-150500.20.43.1
  • vim SLES 16.0, Linux Micro Extras 6.2, Linux Micro 6.2 +1 more 9.2.0110-160000.1.1
  • vim Linux Micro 6.1 9.2.0110-slfo.1.1_1.1
  • vim Linux Micro 6.0 9.2.0045-1.1
  • vim SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 9.2.0110-17.59.1

suse advisories SUSE-SU-2026:1051-1SUSE-SU-2026:1095-1SUSE-SU-2026:0910-1SUSE-SU-2026:20759-1SUSE-SU-2026:20916-1SUSE-SU-2026:20765-1

  • vim openSUSE Leap 16.0 9.2.0110-160000.1.1

opensuse advisories openSUSE-SU-2026:20403-1

  • vim CBL-Mariner 2.0, Azure Linux 3.0 9.2.0088-1

azure linux advisories AZL-77592AZL-77850

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-26269 updated cvss 7.5

vim: Netbeans specialKeys stack buffer overflow

  • Red Hat Enterprise Linux 6 vim, vim-X11, vim-common, vim-minimal, vim-enhanced, vim-filesystem Red Hat Enterprise Linux 7 vim, vim-X11, vim-common, vim-minimal, vim-enhanced, vim-filesystem Red Hat Enterprise Linux 8 vim, vim-X11, vim-common, vim-minimal, vim-enhanced, vim-filesystem Red Hat Enterprise Linux 9 vim, vim-X11, vim-common, vim-minimal, vim-enhanced, vim-filesystem Red Hat Enterprise Linux 10 vim Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “To mitigate this vulnerability, do not start Vim with the -nb command line option. Also, users should avoid manually running commands that initiate a NetBeans connection, such as :nbstart or :nbkey.”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-dashboard-rhel9
    under investigation

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
8 mo ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • vim vim

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.