CVE-2021-27135

    Dashboard / Vulnerabilities / CVE-2021-27135

    CVE-2021-27135

    Published: 10 Feb 2021Last Modified: 9 Jul 2026

    Summary:

    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/, http://seclists.org/fulldisclosure/2021/May/52, 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://lists.debian.org/debian-lts-announce/2021/02/msg00019.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, https://bugzilla.redhat.com/show_bug.cgi?id=1927559, https://bugzilla.suse.com/show_bug.cgi?id=1182091, https://news.ycombinator.com/item?id=26524650, https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -a8fc74f3bcca38d5a288c9947f3e9d48868a3a3f

    Affected versions

    xterm-366i

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-27135 | CVE-DB