CVE-2018-20961

CRITICALEPSS 93th pctl

9.8

CVSS v3

Description

In the Linux kernel before 4.16.4, a double free vulnerability in the f_midi_set_alt function of drivers/usb/gadget/function/f_midi.c in the f_midi driver may allow attackers to cause a denial of service or possibly have unspecified other impact.

CWE-415

How to fix

Remediation Available

linuxDebian

Fixed in:4.16.5-1CVE-2018-20961

linuxUbuntu

Fixed in:4.4.0-165.193USN-4145-1

linux-awsUbuntu

Fixed in:4.4.0-1095.106USN-4145-1

linux-image-4.4.0-1059-kvmUbuntu

Fixed in:4.4.0-1059.66USN-4145-1

linux-image-4.4.0-1095-awsUbuntu

Fixed in:4.4.0-1095.106USN-4145-1

linux-image-4.4.0-1123-raspi2Ubuntu

Fixed in:4.4.0-1123.132USN-4145-1

linux-image-4.4.0-1127-snapdragonUbuntu

Fixed in:4.4.0-1127.135USN-4145-1

linux-image-4.4.0-165-genericUbuntu

Fixed in:4.4.0-165.193USN-4145-1

linux-image-4.4.0-165-generic-lpaeUbuntu

Fixed in:4.4.0-165.193USN-4145-1

linux-image-4.4.0-165-lowlatencyUbuntu

Fixed in:4.4.0-165.193USN-4145-1

linux-image-4.4.0-165-powerpc-e500mcUbuntu

Fixed in:4.4.0-165.193USN-4145-1

linux-image-4.4.0-165-powerpc-smpUbuntu

Fixed in:4.4.0-165.193USN-4145-1

linux-image-4.4.0-165-powerpc64-embUbuntu

Fixed in:4.4.0-165.193USN-4145-1

linux-image-4.4.0-165-powerpc64-smpUbuntu

Fixed in:4.4.0-165.193USN-4145-1

linux-image-awsUbuntu

Fixed in:4.4.0.1095.99USN-4145-1

linux-image-genericUbuntu

Fixed in:4.4.0.165.173USN-4145-1

linux-image-generic-lpaeUbuntu

Fixed in:4.4.0.165.173USN-4145-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1059.59USN-4145-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.165.173USN-4145-1

linux-image-powerpc-e500mcUbuntu

Fixed in:4.4.0.165.173USN-4145-1

linux-image-powerpc-smpUbuntu

Fixed in:4.4.0.165.173USN-4145-1

linux-image-powerpc64-embUbuntu

Fixed in:4.4.0.165.173USN-4145-1

linux-image-powerpc64-smpUbuntu

Fixed in:4.4.0.165.173USN-4145-1

linux-image-raspi2Ubuntu

Fixed in:4.4.0.1123.123USN-4145-1

linux-image-snapdragonUbuntu

Fixed in:4.4.0.1127.119USN-4145-1

linux-image-virtualUbuntu

Fixed in:4.4.0.165.173USN-4145-1

linux-kvmUbuntu

Fixed in:4.4.0-1059.66USN-4145-1

linux-raspi2Ubuntu

Fixed in:4.4.0-1123.132USN-4145-1

linux-snapdragonUbuntu

Fixed in:4.4.0-1127.135USN-4145-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

6.34%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Patch1

github.com

Exploit1

git.kernel.org

Vendor Advisory1

cdn.kernel.org

Third-Party Advisory6

Other references1

support.f5.com

Related Vulnerabilities

Other CWE-415 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-25136	Medium	6.5	90%	-	Fix
CVE-2018-0101	Critical	10.0	87%	-	Fix
CVE-2003-0545	Critical	9.8	85%	-	Fix
CVE-2019-3829	Medium	5.3	59%	-	Fix
CVE-2026-33824	Critical	9.8	56%	-	Fix
CVE-2021-3407	Medium	5.5	50%	-	Fix

Common questions

How do I fix CVE-2018-20961?

Published advisories record a fix for 29 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2018-20961 being actively exploited?

Not that we know of. CVE-2018-20961 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 6.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 93% of all scored CVEs.

How severe is CVE-2018-20961?

CVE-2018-20961 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-20961 affect?

Published advisories record a fix for linux (Debian), linux (Ubuntu), linux-aws (Ubuntu), linux-image-4.4.0-1059-kvm (Ubuntu), and 25 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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.