What’s Vulnerable › Vulnerabilities

CVE-2018-15861

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-08-25 · updated 2026-06-17
• Weakness: CWE-476

Description

Unchecked NULL pointer usage in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file that triggers an xkb_intern_atom failure.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04
• Xkbcommon Libxkbcommon: through 0.8.1
• Xkbcommon: through 0.8.1

References

• https://access.redhat.com/errata/RHSA-2019:2079
• https://github.com/xkbcommon/libxkbcommon/commit/38e1766bc6e20108948aec8a0b222a4bad0254e9
• https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
• https://security.gentoo.org/glsa/201810-05
• https://usn.ubuntu.com/3786-1/
• https://usn.ubuntu.com/3786-2/
• https://access.redhat.com/errata/RHSA-2019:2079
• https://github.com/xkbcommon/libxkbcommon/commit/38e1766bc6e20108948aec8a0b222a4bad0254e9
• https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
• https://security.gentoo.org/glsa/201810-05
• https://usn.ubuntu.com/3786-1/
• https://usn.ubuntu.com/3786-2/

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