Is CVE-2018-15859 in the CISA KEV catalog?

No. CVE-2018-15859 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-15859?

CVE-2018-15859 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2018-15859?

CVE-2018-15859 has an EPSS score of 0.53% (41th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-15859?

Upgrade libxkbcommon on debian 11 to 0.8.2-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2018-15859

MEDIUM

5.5

CVSS v3

NVD

Description

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.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

libxkbcommonDebian

Fixed in:0.8.2-1CVE-2018-15859

libxkbcommonUbuntu

Fixed in:0.4.1-0ubuntu1.1USN-3786-1

Fixed in:0.5.0-1ubuntu2.1USN-3786-1

Fixed in:0.8.0-1ubuntu0.1USN-3786-2

libxkbcommon-x11-0Ubuntu

Fixed in:0.4.1-0ubuntu1.1USN-3786-1

Fixed in:0.5.0-1ubuntu2.1USN-3786-1

Fixed in:0.8.0-1ubuntu0.1USN-3786-2

libxkbcommon0Ubuntu

Fixed in:0.4.1-0ubuntu1.1USN-3786-1

Fixed in:0.5.0-1ubuntu2.1USN-3786-1

Fixed in:0.8.0-1ubuntu0.1USN-3786-2

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.53%probability of exploitation in 30 days

41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Patch2

Third-Party Advisory3

Other references1

access.redhat.com

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.