Is CVE-2016-0821 in the CISA KEV catalog?

No. CVE-2016-0821 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-0821?

CVE-2016-0821 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2016-0821?

CVE-2016-0821 has an EPSS score of 0.38% (30th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-0821?

Upgrade linux on debian 11 to 4.3.1-1 or later. Fixes are available for 34 affected products.

CVE & CISA-KEV Catalog

CVE-2016-0821

MEDIUM

5.5

CVSS v3

NVD

Description

The LIST_POISON feature in include/linux/poison.h in the Linux kernel before 4.3, as used in Android 6.0.1 before 2016-03-01, does not properly consider the relationship to the mmap_min_addr value, which makes it easier for attackers to bypass a poison-pointer protection mechanism by triggering the use of an uninitialized list entry, aka Android internal bug 26186802, a different vulnerability than CVE-2015-3636.

CWE-908

How to fix

Remediation Available

linuxDebian

Fixed in:4.3.1-1CVE-2016-0821

linuxUbuntu

Fixed in:3.13.0-86.130USN-2968-1

linux-image-3.13.0-86-genericUbuntu

Fixed in:3.13.0-86.130USN-2968-1

linux-image-3.13.0-86-generic-lpaeUbuntu

Fixed in:3.13.0-86.130USN-2968-1

linux-image-3.13.0-86-lowlatencyUbuntu

Fixed in:3.13.0-86.130USN-2968-1

linux-image-3.13.0-86-powerpc-e500Ubuntu

Fixed in:3.13.0-86.130USN-2968-1

linux-image-3.13.0-86-powerpc-e500mcUbuntu

Fixed in:3.13.0-86.130USN-2968-1

linux-image-3.13.0-86-powerpc-smpUbuntu

Fixed in:3.13.0-86.130USN-2968-1

linux-image-3.13.0-86-powerpc64-embUbuntu

Fixed in:3.13.0-86.130USN-2968-1

linux-image-3.13.0-86-powerpc64-smpUbuntu

Fixed in:3.13.0-86.130USN-2968-1

linux-image-3.16.0-71-genericUbuntu

Fixed in:3.16.0-71.91~14.04.1USN-2969-1

linux-image-3.16.0-71-generic-lpaeUbuntu

Fixed in:3.16.0-71.91~14.04.1USN-2969-1

linux-image-3.16.0-71-lowlatencyUbuntu

Fixed in:3.16.0-71.91~14.04.1USN-2969-1

linux-image-3.16.0-71-powerpc-e500mcUbuntu

Fixed in:3.16.0-71.91~14.04.1USN-2969-1

linux-image-3.16.0-71-powerpc-smpUbuntu

Fixed in:3.16.0-71.91~14.04.1USN-2969-1

linux-image-3.16.0-71-powerpc64-embUbuntu

Fixed in:3.16.0-71.91~14.04.1USN-2969-1

linux-image-3.16.0-71-powerpc64-smpUbuntu

Fixed in:3.16.0-71.91~14.04.1USN-2969-1

linux-image-3.19.0-59-genericUbuntu

Fixed in:3.19.0-59.65~14.04.1USN-2970-1

linux-image-3.19.0-59-generic-lpaeUbuntu

Fixed in:3.19.0-59.65~14.04.1USN-2970-1

linux-image-3.19.0-59-lowlatencyUbuntu

Fixed in:3.19.0-59.65~14.04.1USN-2970-1

linux-image-3.19.0-59-powerpc-e500mcUbuntu

Fixed in:3.19.0-59.65~14.04.1USN-2970-1

linux-image-3.19.0-59-powerpc-smpUbuntu

Fixed in:3.19.0-59.65~14.04.1USN-2970-1

linux-image-3.19.0-59-powerpc64-embUbuntu

Fixed in:3.19.0-59.65~14.04.1USN-2970-1

linux-image-3.19.0-59-powerpc64-smpUbuntu

Fixed in:3.19.0-59.65~14.04.1USN-2970-1

linux-image-4.2.0-36-genericUbuntu

Fixed in:4.2.0-36.41~14.04.1USN-2971-2

linux-image-4.2.0-36-generic-lpaeUbuntu

Fixed in:4.2.0-36.41~14.04.1USN-2971-2

linux-image-4.2.0-36-lowlatencyUbuntu

Fixed in:4.2.0-36.41~14.04.1USN-2971-2

linux-image-4.2.0-36-powerpc-e500mcUbuntu

Fixed in:4.2.0-36.41~14.04.1USN-2971-2

linux-image-4.2.0-36-powerpc-smpUbuntu

Fixed in:4.2.0-36.41~14.04.1USN-2971-2

linux-image-4.2.0-36-powerpc64-embUbuntu

Fixed in:4.2.0-36.41~14.04.1USN-2971-2

linux-image-4.2.0-36-powerpc64-smpUbuntu

Fixed in:4.2.0-36.41~14.04.1USN-2971-2

linux-lts-utopicUbuntu

Fixed in:3.16.0-71.91~14.04.1USN-2969-1

linux-lts-vividUbuntu

Fixed in:3.19.0-59.65~14.04.1USN-2970-1

linux-lts-wilyUbuntu

Fixed in:4.2.0-36.41~14.04.1USN-2971-2

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

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.38%probability of exploitation in 30 days

30thpercentile

Low risk: more likely to be exploited than 30% of all known CVEs.

References

Patch2

Third-Party Advisory13

Related Vulnerabilities

Other CWE-908 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2023-24941	Critical	9.8	95%	-	Fix
CVE-2007-1751	High	9.3	61%	-	-
CVE-2008-0081	Critical	9.8	58%	-	-
CVE-2020-1934	Medium	5.3	52%	-	Fix
CVE-2011-1255	High	9.3	42%	-	-

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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.