VulnerabilityModified

CVE-2018-15853

Endless recursion exists in xkbcomp/expr.c in xkbcommon and libxkbcommon before 0.8.1, which could be used by local attackers to crash xkbcommon users by supplying a crafted keymap file that triggers boolean negation.

MEDIUM 5.5EPSS 0.53%

Does this matter?

Lower severity and a low EPSS score (0.53%). Track it; it rarely justifies an emergency change on its own.

Description

CVSS 3.0: 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.53% probability · 45th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-400
Affected: xkbcommon/libxkbcommon · xkbcommon/xkbcommon · canonical/ubuntu linux
Source: cve@mitre.org

EPSS trend

EPSS 0.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

https://access.redhat.com/errata/RHSA-2019:2079
https://github.com/xkbcommon/libxkbcommon/commit/1f9d1248c07cda8aaff762429c0dce146de8632aPatch, Third Party Advisory
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.htmlMailing List, Patch, Third Party Advisory
https://security.gentoo.org/glsa/201810-05Third Party Advisory
https://usn.ubuntu.com/3786-1/Third Party Advisory
https://usn.ubuntu.com/3786-2/Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2079
https://github.com/xkbcommon/libxkbcommon/commit/1f9d1248c07cda8aaff762429c0dce146de8632aPatch, Third Party Advisory
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.htmlMailing List, Patch, Third Party Advisory
https://security.gentoo.org/glsa/201810-05Third Party Advisory
https://usn.ubuntu.com/3786-1/Third Party Advisory
https://usn.ubuntu.com/3786-2/Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.