CVE-2026-55892: Vim is an open source, command line text editor

Q: How do I fix CVE-2026-55892?

vim: upgrade to 9.2.0662. Exact commands for each OS are on this page.

Q: Is CVE-2026-55892 being exploited?

CVE-2026-55892 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-55892 affect?

CVE-2026-55892 affects vim. Severity is medium (CVSS 5.5). 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

Q: How urgent is CVE-2026-55892?

Priority 20/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2026-55892 is a medium-severity flaw (CVSS 5.5) affecting vim. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 98%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-06-25
Last modified	2026-06-26

Publisher (CNA): GitHub, Inc. · Vendor: vim

Last updated 2026-06-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-25 16:16 UTCPublished CVE record published
2026-06-26 19:16 UTCUpdated Record last modified

vim vim UPGRADE

Affected: < 9.2.0662

Fixed in: 9.2.0662

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy vim || rpm -q vim || vim --version

2. UPGRADE to 9.2.0662 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vim

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vim

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-55892?

vim: upgrade to 9.2.0662. Exact commands for each OS are on this page.

Is CVE-2026-55892 being exploited?

CVE-2026-55892 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-55892 affect?

CVE-2026-55892 affects vim. Severity is medium (CVSS 5.5). 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

How urgent is CVE-2026-55892?

Priority 20/100. No elevated risk signals yet.

Software pages

Vim vulnerabilities

Related CVEs

CVE-2026-51400 HIGH 8.4 UPGRADE An issue in Vim Project v9.2.0389 and earlier allows a local attacker to execute arbitrary code via the vms_fi
CVE-2026-51401 HIGH 7.7 UPGRADE An issue in Vim Project v9.2.0389 and earlier allows a local attacker to execute arbitrary code via the vms_fi
CVE-2026-34982 HIGH 8.2 UPGRADE Vim is an open source, command line text editor
CVE-2026-73071 LOW 3.3 UPGRADE Vim is an open source, command line text editor
CVE-2026-73072 HIGH 7.3 UPGRADE Vim is an open source, command line text editor

References

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