MEDIUM

CVE-2026-25749

Heap Overflow in Vim

CVSS v3

6.6

MEDIUM

EPSS Score

0.2 %

exploit probability, as of 2026-10-15

CISA KEV

known exploited

Exploitation

none

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

vim-dataAlmaLinux:10all versions · fixed in 2:9.1.083-6.el10_1.1and 1 other package
vim-X11AlmaLinux:9all versions · fixed in 2:8.2.2637-23.el9_7.1and 4 other packages
vim-X11AlmaLinux:8all versions · fixed in 2:8.0.1763-22.el8_10and 4 other packages

Vendor advisories

CVE-2026-25749 Red Hat Product Security649 products fixed · 7 known affected
vim: Vim: Arbitrary code execution via 'helpfile' option processing
vim-X11 as a component of Red Hat Enterprise Linux 6 · vim-common as a component of Red Hat Enterprise Linux 6 · vim-enhanced as a component of Red Hat Enterprise Linux 6
RHSA-2026:25096 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server Model Optimization Tools 3.2.2 (cuda)
RHSA-2026:17596 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.17.54 bug fix and security update
RHSA-2026:14773 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.15.64 bug fix and security update
RHSA-2026:15087 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.14.65 bug fix and security update
RHSA-2026:16174 Red Hat Product Security3 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.3 (Spyre)

23 more advisories

Full record on NVD

Description

Vim is an open source, command line text editor. Prior to version 9.1.2132, a heap buffer overflow vulnerability exists in Vim's tag file resolution logic when processing the 'helpfile' option. The vulnerability is located in the get_tagfname() function in src/tag.c. When processing help file tags, Vim copies the user-controlled 'helpfile' option value into a fixed-size heap buffer of MAXPATHL + 1 bytes (typically 4097 bytes) using an unsafe STRCPY() operation without any bounds checking. This issue has been patched in version 9.1.2132.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
Published: 2026-02-06
Last Modified: 2026-02-20

Frequently asked questions

What is CVE-2026-25749?

Is CVE-2026-25749 actively exploited?

Active exploitation of CVE-2026-25749 has not been confirmed. Its EPSS score was 0.2% on 2026-10-15, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-25749?

CVE-2026-25749 has a CVSS v3 base score of 6.6 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H.

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