CVE-2018-15855

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 36.1% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2018-08-25 21:00Z8 YR AGO

Last updated

2024-08-05 10:10Z2 YR AGO

Reserved

2018-08-24

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.1

Document digest

f8c0729ea8a34decb47d9f3dc423588ad0499fdc94e56490a6ba70a2ac468e83

• security.gentoo.orgGLSA-201810-05https://security.gentoo.org/glsa/201810-05vendor-advisoryx_refsource_GENTOO
• usn.ubuntu.comUSN-3786-1https://usn.ubuntu.com/3786-1/vendor-advisoryx_refsource_UBUNTU
• usn.ubuntu.comUSN-3786-2https://usn.ubuntu.com/3786-2/vendor-advisoryx_refsource_UBUNTU
• lists.freedesktop.orghttps://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.htmlx_refsource_MISC
• github.comhttps://github.com/xkbcommon/libxkbcommon/commit/917636b1d0d70205a13f89062b95e3a0fc31d4ffx_refsource_MISC
• access.redhat.comRHSA-2019:2079https://access.redhat.com/errata/RHSA-2019:2079vendor-advisoryx_refsource_REDHAT