CVE-2018-6917

Published: Apr 4, 2018Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p9, 10.4-STABLE, 10.4-RELEASE-p8 and 10.3-RELEASE-p28, insufficient validation of user-provided font parameters can result in an integer overflow, leading to the use of arbitrary kernel memory as glyph data. Unprivileged users may be able to access privileged kernel data.

Affected (2)

Products: Freebsd: Freebsd

1 product

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Freebsd Freebsd	From 10.0 to 10.4
Freebsd Freebsd	From 11.0 to 11.1

Related CWEs

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (6)

http://www.securityfocus.com/bid/103668

Source: secteam@freebsd.org

Third Party AdvisoryVDB Entry

http://www.securitytracker.com/id/1040629

Source: secteam@freebsd.org

Third Party AdvisoryVDB Entry

https://security.FreeBSD.org/advisories/FreeBSD-SA-18:04.vt.asc

Source: secteam@freebsd.org

Vendor Advisory

http://www.securityfocus.com/bid/103668

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party AdvisoryVDB Entry

http://www.securitytracker.com/id/1040629

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party AdvisoryVDB Entry

https://security.FreeBSD.org/advisories/FreeBSD-SA-18:04.vt.asc

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.