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CVE-2018-15864

libxkbcommon: NULL pointer dereference in resolve_keysym resulting in a crash

Unchecked NULL pointer usage in resolve_keysym in xkbcomp/parser.y 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, because a map access attempt can occur for a map that was never created.

CVSS 3.0 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Redhat Xkbcommon
Products
Ubuntu Linux Enterprise Linux Libxkbcommon and 1 more
CVE-2018-15863

libxkbcommon: NULL pointer dereference in ResolveStateAndPredicate resulting in a crash

Unchecked NULL pointer usage in ResolveStateAndPredicate in xkbcomp/compat.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 with a no-op modmask expression.

CVSS 3.0 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Redhat Xkbcommon
Products
Ubuntu Linux Enterprise Linux Libxkbcommon and 1 more
CVE-2018-15862

libxkbcommon: NULL pointer dereference in LookupModMask resulting in a crash

Unchecked NULL pointer usage in LookupModMask 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 with invalid virtual modifiers.

CVSS 3.0 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Redhat Xkbcommon
Products
Ubuntu Linux Enterprise Linux Libxkbcommon and 1 more
CVE-2018-15861

libxkbcommon: NULL pointer dereference in ExprResolveLhs resulting in a crash

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.

CVSS 3.0 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Redhat Xkbcommon
Products
Ubuntu Linux Enterprise Linux Libxkbcommon and 1 more
CVE-2018-15859

libxkbcommon: NULL pointer dereference when parsing invalid atoms in ExprResolveLhs resulting in a crash

Unchecked NULL pointer usage when parsing invalid atoms 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, because lookup failures are mishandled.

CVSS 3.0 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Redhat Xkbcommon
Products
Ubuntu Linux Enterprise Linux Libxkbcommon and 1 more
CVE-2018-15858

libxkbcommon: NULL pointer dereference when handling invalid aliases in CopyKeyAliasesToKeymap resulting in a crash

Unchecked NULL pointer usage when handling invalid aliases in CopyKeyAliasesToKeymap in xkbcomp/keycodes.c in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file.

CVSS 3.0 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Xkbcommon
Products
Ubuntu Linux Libxkbcommon Xkbcommon
CVE-2018-15857

libxkbcommon: Invalid free in ExprAppendMultiKeysymList resulting in a crash

An invalid free in ExprAppendMultiKeysymList in xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be used by local attackers to crash xkbcommon keymap parsers or possibly have unspecified other impact by supplying a crafted keymap file.

CVSS 3.0 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Canonical Redhat Xkbcommon
Products
Ubuntu Linux Enterprise Linux Libxkbcommon and 1 more
CVE-2018-15853

libxkbcommon: Endless recursion in xkbcomp/expr.c resulting in a crash

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.

CVSS 3.0 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Redhat Xkbcommon
Products
Ubuntu Linux Enterprise Linux Libxkbcommon and 1 more