Is CVE-2016-2543 in the CISA KEV catalog?

No. CVE-2016-2543 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-2543?

CVE-2016-2543 has a CVSS v3 base score of 6.2 (MEDIUM).

What is the EPSS score for CVE-2016-2543?

CVE-2016-2543 has an EPSS score of 0.52% (41th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-2543?

Upgrade linux on debian 11 to 4.4.2-1 or later. Fixes are available for 34 affected products.

CVE & CISA-KEV Catalog

CVE-2016-2543

MEDIUM

6.2

CVSS v3

NVD

Description

The snd_seq_ioctl_remove_events function in sound/core/seq/seq_clientmgr.c in the Linux kernel before 4.4.1 does not verify FIFO assignment before proceeding with FIFO clearing, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via a crafted ioctl call.

How to fix

Remediation Available

linuxDebian

Fixed in:4.4.2-1CVE-2016-2543

linuxUbuntu

Fixed in:3.13.0-83.127USN-2929-1

linux-image-3.13.0-83-genericUbuntu

Fixed in:3.13.0-83.127USN-2929-1

linux-image-3.13.0-83-generic-lpaeUbuntu

Fixed in:3.13.0-83.127USN-2929-1

linux-image-3.13.0-83-lowlatencyUbuntu

Fixed in:3.13.0-83.127USN-2929-1

linux-image-3.13.0-83-powerpc-e500Ubuntu

Fixed in:3.13.0-83.127USN-2929-1

linux-image-3.13.0-83-powerpc-e500mcUbuntu

Fixed in:3.13.0-83.127USN-2929-1

linux-image-3.13.0-83-powerpc-smpUbuntu

Fixed in:3.13.0-83.127USN-2929-1

linux-image-3.13.0-83-powerpc64-embUbuntu

Fixed in:3.13.0-83.127USN-2929-1

linux-image-3.13.0-83-powerpc64-smpUbuntu

Fixed in:3.13.0-83.127USN-2929-1

linux-image-3.16.0-67-genericUbuntu

Fixed in:3.16.0-67.87~14.04.1USN-2931-1

linux-image-3.16.0-67-generic-lpaeUbuntu

Fixed in:3.16.0-67.87~14.04.1USN-2931-1

linux-image-3.16.0-67-lowlatencyUbuntu

Fixed in:3.16.0-67.87~14.04.1USN-2931-1

linux-image-3.16.0-67-powerpc-e500mcUbuntu

Fixed in:3.16.0-67.87~14.04.1USN-2931-1

linux-image-3.16.0-67-powerpc-smpUbuntu

Fixed in:3.16.0-67.87~14.04.1USN-2931-1

linux-image-3.16.0-67-powerpc64-embUbuntu

Fixed in:3.16.0-67.87~14.04.1USN-2931-1

linux-image-3.16.0-67-powerpc64-smpUbuntu

Fixed in:3.16.0-67.87~14.04.1USN-2931-1

linux-image-3.19.0-56-genericUbuntu

Fixed in:3.19.0-56.62~14.04.1USN-2932-1

linux-image-3.19.0-56-generic-lpaeUbuntu

Fixed in:3.19.0-56.62~14.04.1USN-2932-1

linux-image-3.19.0-56-lowlatencyUbuntu

Fixed in:3.19.0-56.62~14.04.1USN-2932-1

linux-image-3.19.0-56-powerpc-e500mcUbuntu

Fixed in:3.19.0-56.62~14.04.1USN-2932-1

linux-image-3.19.0-56-powerpc-smpUbuntu

Fixed in:3.19.0-56.62~14.04.1USN-2932-1

linux-image-3.19.0-56-powerpc64-embUbuntu

Fixed in:3.19.0-56.62~14.04.1USN-2932-1

linux-image-3.19.0-56-powerpc64-smpUbuntu

Fixed in:3.19.0-56.62~14.04.1USN-2932-1

linux-image-4.2.0-34-genericUbuntu

Fixed in:4.2.0-34.39~14.04.1USN-2930-2

linux-image-4.2.0-34-generic-lpaeUbuntu

Fixed in:4.2.0-34.39~14.04.1USN-2930-2

linux-image-4.2.0-34-lowlatencyUbuntu

Fixed in:4.2.0-34.39~14.04.1USN-2930-2

linux-image-4.2.0-34-powerpc-e500mcUbuntu

Fixed in:4.2.0-34.39~14.04.1USN-2930-2

linux-image-4.2.0-34-powerpc-smpUbuntu

Fixed in:4.2.0-34.39~14.04.1USN-2930-2

linux-image-4.2.0-34-powerpc64-embUbuntu

Fixed in:4.2.0-34.39~14.04.1USN-2930-2

linux-image-4.2.0-34-powerpc64-smpUbuntu

Fixed in:4.2.0-34.39~14.04.1USN-2930-2

linux-lts-utopicUbuntu

Fixed in:3.16.0-67.87~14.04.1USN-2931-1

linux-lts-vividUbuntu

Fixed in:3.19.0-56.62~14.04.1USN-2932-1

linux-lts-wilyUbuntu

Fixed in:4.2.0-34.39~14.04.1USN-2930-2

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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.52%probability of exploitation in 30 days

41stpercentile

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

References

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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 2026-05-06.