CVE-2021-27135
- Source
- https://cve.org/CVERecord?id=CVE-2021-27135
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27135.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-27135
- Downstream
- Related
- Published
- 2021-02-10T16:15:13.787Z
- Modified
- 2026-04-16T04:31:31.603774141Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
xterm before Patch #366 allows remote attackers to execute arbitrary code or cause a denial of service (segmentation fault) via a crafted UTF-8 combining character sequence.
- References
-
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35LK2ZXEIJUOGOA7FV2TJL3L6LFJ4X5S/
- https://lists.debian.org/debian-lts-announce/2021/02/msg00019.html
- http://www.openwall.com/lists/oss-security/2021/02/10/7
- https://access.redhat.com/security/cve/CVE-2021-27135
- https://invisible-island.net/xterm/xterm.log.html
- https://security.gentoo.org/glsa/202208-22
- https://www.openwall.com/lists/oss-security/2021/02/09/7
- https://www.openwall.com/lists/oss-security/2021/02/09/9
- http://seclists.org/fulldisclosure/2021/May/52
- https://news.ycombinator.com/item?id=26524650
- https://bugzilla.suse.com/show_bug.cgi?id=1182091
- https://bugzilla.redhat.com/show_bug.cgi?id=1927559
- https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c
Affected packages
Git / github.com/ThomasDickey/xterm-snapshots
Affected ranges
- Type
- GIT
- Repo
- https://github.com/ThomasDickey/xterm-snapshots
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
{ "versions": [ { "introduced": "0" }, { "fixed": "366" } ] }
- Type
- GIT
- Repo
- https://github.com/thomasdickey/xterm-snapshots
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
Affected versions
Other
X11R5
X11R6_1rel
X11R6_3rel
XFree86-3_1_2E
XFree86-3_1_2F
XFree86-3_1_2G
XFree86-3_2
XFree86-3_2A
XFree86-3_3
XFree86-3_9Ab
XFree86-3_9Ac
XFree86-3_9Ad
XFree86-3_9Af
XFree86-3_9Ag
XFree86-3_9Ah
XFree86-3_9Ai
XFree86-3_9Aj
XFree86-3_9Nb
XFree86-3_9Nc
XFree86-3_9Nk
XFree86-3_9Nl
XFree86-3_9Nn
XFree86-3_9Ns
XFree86-3_9Nx
XFree86-3_9Nz
XFree86-3_9P
XFree86-3_9Pe
XFree86-3_9Pg
XFree86-3_9Pi
XFree86-3_9Pn
XFree86-3_9Pq
XFree86-3_9Ps
XFree86-3_9Pv
XFree86-3_9Px
XFree86-3_9_15
XFree86-3_9_15c
XFree86-3_9_16b
XFree86-3_9_16d
XFree86-3_9_17
XFree86-3_9_17a
XFree86-3_9_17e
XFree86-3_9_17f
XFree86-3_9_18
XFree86-3_9k
XFree86-3_9m
XFree86-3_9n
XFree86-3_9q
XFree86-3_9s
XFree86-3_9t
XFree86-3_9w
XFree86-3_9y
XFree86-4_0_1c
XFree86-4_0_1d
XFree86-4_0_1e
XFree86-4_0b
XFree86-4_0c
XFree86-4_0d
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Database specific
source
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"338580243167605740160088853352923993522",
"47552319049112998642253747127800896038",
"172384635736661599305534344939471289138"
],
"threshold": 0.9
},
"signature_type": "Line",
"id": "CVE-2021-27135-e1a347ec"
},
{
"signature_version": "v1",
"source": "https://github.com/thomasdickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c",
"digest": {
"function_hash": "98433897814228501755533246292104164193",
"length": 2116.0
},
"target": {
"function": "SaltTextAway",
"file": "button.c"
},
"deprecated": false,
"signature_type": "Function",
"id": "CVE-2021-27135-f415546d"
}
]
unresolved_ranges
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "9.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "33"
}
]
}
]
vanir_signatures_modified
"2026-04-11T13:54:03Z"