Is CVE-2018-15857 in the CISA KEV catalog?

No. CVE-2018-15857 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-15857?

CVE-2018-15857 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2018-15857?

CVE-2018-15857 has an EPSS score of 0.45% (36th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-15857?

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

CVE & CISA-KEV Catalog

CVE-2018-15857

HIGH

7.8

CVSS v3

NVD

Description

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.

CWE-416Use After Free

How to fix

Remediation Available

libxkbcommonDebian

Fixed in:0.8.2-1CVE-2018-15857

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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.45%probability of exploitation in 30 days

36thpercentile

Low risk: more likely to be exploited than 36% of all known CVEs.

References

Patch2

Third-Party Advisory3

Other references1

access.redhat.com

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	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.