ubuntu-cve-2026-55892
Vulnerability from osv_ubuntu
Published
2026-06-25 16:16
Modified
2026-07-02 20:49
Summary
Details
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.
Severity
5.5 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
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"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
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{
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{
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"binary_name": "vim-gtk3-py2",
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"2:9.0.2189-1ubuntu1",
"2:9.1.0-1ubuntu1",
"2:9.1.0016-1ubuntu2",
"2:9.1.0016-1ubuntu6",
"2:9.1.0016-1ubuntu7",
"2:9.1.0016-1ubuntu7.1",
"2:9.1.0016-1ubuntu7.2",
"2:9.1.0016-1ubuntu7.3",
"2:9.1.0016-1ubuntu7.4",
"2:9.1.0016-1ubuntu7.5",
"2:9.1.0016-1ubuntu7.6",
"2:9.1.0016-1ubuntu7.7",
"2:9.1.0016-1ubuntu7.8",
"2:9.1.0016-1ubuntu7.9",
"2:9.1.0016-1ubuntu7.10",
"2:9.1.0016-1ubuntu7.11",
"2:9.1.0016-1ubuntu7.12",
"2:9.1.0016-1ubuntu7.13",
"2:9.1.0016-1ubuntu7.14",
"2:9.1.0016-1ubuntu7.15",
"2:9.1.0016-1ubuntu7.16"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "vim",
"binary_version": "2:9.1.0967-1ubuntu6.8"
},
{
"binary_name": "vim-athena",
"binary_version": "2:9.1.0967-1ubuntu6.8"
},
{
"binary_name": "vim-common",
"binary_version": "2:9.1.0967-1ubuntu6.8"
},
{
"binary_name": "vim-gtk3",
"binary_version": "2:9.1.0967-1ubuntu6.8"
},
{
"binary_name": "vim-gui-common",
"binary_version": "2:9.1.0967-1ubuntu6.8"
},
{
"binary_name": "vim-motif",
"binary_version": "2:9.1.0967-1ubuntu6.8"
},
{
"binary_name": "vim-nox",
"binary_version": "2:9.1.0967-1ubuntu6.8"
},
{
"binary_name": "vim-runtime",
"binary_version": "2:9.1.0967-1ubuntu6.8"
},
{
"binary_name": "vim-tiny",
"binary_version": "2:9.1.0967-1ubuntu6.8"
},
{
"binary_name": "xxd",
"binary_version": "2:9.1.0967-1ubuntu6.8"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "vim",
"purl": "pkg:deb/ubuntu/vim@2:9.1.0967-1ubuntu6.8?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:9.1.0967-1ubuntu6.8"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:9.1.0967-1ubuntu4",
"2:9.1.0967-1ubuntu5",
"2:9.1.0967-1ubuntu6",
"2:9.1.0967-1ubuntu6.1",
"2:9.1.0967-1ubuntu6.2",
"2:9.1.0967-1ubuntu6.3",
"2:9.1.0967-1ubuntu6.4",
"2:9.1.0967-1ubuntu6.5",
"2:9.1.0967-1ubuntu6.6",
"2:9.1.0967-1ubuntu6.7"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "vim",
"binary_version": "2:9.1.2141-1ubuntu4.6"
},
{
"binary_name": "vim-common",
"binary_version": "2:9.1.2141-1ubuntu4.6"
},
{
"binary_name": "vim-gtk3",
"binary_version": "2:9.1.2141-1ubuntu4.6"
},
{
"binary_name": "vim-gui-common",
"binary_version": "2:9.1.2141-1ubuntu4.6"
},
{
"binary_name": "vim-motif",
"binary_version": "2:9.1.2141-1ubuntu4.6"
},
{
"binary_name": "vim-nox",
"binary_version": "2:9.1.2141-1ubuntu4.6"
},
{
"binary_name": "vim-runtime",
"binary_version": "2:9.1.2141-1ubuntu4.6"
},
{
"binary_name": "vim-tiny",
"binary_version": "2:9.1.2141-1ubuntu4.6"
},
{
"binary_name": "xxd",
"binary_version": "2:9.1.2141-1ubuntu4.6"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "vim",
"purl": "pkg:deb/ubuntu/vim@2:9.1.2141-1ubuntu4.6?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:9.1.2141-1ubuntu4.6"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:9.1.0967-1ubuntu6",
"2:9.1.1882-1ubuntu1",
"2:9.1.1882-1ubuntu2",
"2:9.1.2141-1ubuntu1",
"2:9.1.2141-1ubuntu2",
"2:9.1.2141-1ubuntu4",
"2:9.1.2141-1ubuntu4.1",
"2:9.1.2141-1ubuntu4.2",
"2:9.1.2141-1ubuntu4.3",
"2:9.1.2141-1ubuntu4.5"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-55892",
"modified": "2026-07-02T20:49:18Z",
"published": "2026-06-25T16:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-55892"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-55892"
},
{
"type": "REPORT",
"url": "https://github.com/vim/vim/security/advisories/GHSA-qm9w-fmpj-879h"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8500-1"
}
],
"related": [
"USN-8500-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-55892"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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