CVE-2016-9919 [High] | Input Validation Bypass in Linux Kernel

CVE-2016-9919 is rated Moderate Risk (62.4/100): CVSS High severity, with high exploitation likelihood (EPSS 5.67%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	5.46%	5.67%	+0.21%
2	2026-01-25	2.70%	5.46%	+2.75%
3	2025-03-30	—	2.70%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

5.46%

5.67%

+0.21%

2026-01-25

2.70%

5.46%

+2.75%

2025-03-30

—

2.70%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]
7.8	2.0	HIGH	`AV:N/AC:L/Au:N/C:N/I:N/A:C` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:C) Complete availability impact.	10.0	6.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

7.8

2.0

HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:C): Complete availability impact.

10.0

6.9

[email protected]

OS Trackers for CVE-2016-9919

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2016-9919 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2016-9919
`redhat`	high	—	https://access.redhat.com/security/cve/CVE-2016-9919
`suse`	medium	CVE-2016-9919 severity moderate: SUSE including 38 source package names (cluster-md-kmp-default-4.4.38-93.1, cluster-network-kmp-default-4.4.38-93.1, …), 126 product×package rows across 21 product lines (HPE Helion OpenStack 8, SUSE Linux Enterprise Desktop 12 SP1, … (21 product lines)): Known Not Affected 69, Fixed 57.	https://www.suse.com/security/cve/CVE-2016-9919/
`ubuntu`	medium	CVE-2016-9919 medium priority: Ubuntu including 83 source packages (linux, linux-armadaxp, …), 650 status rows across 11 suites (bionic, focal, jammy, noble, oracular, precise, trusty, upstream, xenial, yakkety, zesty): DNE 411, not-affected 132, released 90, ignored 17.	https://ubuntu.com/security/CVE-2016-9919

Affected software / configurations for CVE-2016-9919

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 4.8.10, < 4.9	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	4.4.223	cpe:2.3:o:linux:linux_kernel:4.4.223:::::::*
linux	linux_kernel	4.9	cpe:2.3:o:linux:linux_kernel:4.9:rc6::::::
linux	linux_kernel	4.9	cpe:2.3:o:linux:linux_kernel:4.9:rc7::::::

References for CVE-2016-9919

URL	Tags
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=79dc7e3f1cd323be4c81aa1a94faa1b3ed987fb2	Issue Tracking Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/12/08/15	Mailing List Third Party Advisory
http://www.securityfocus.com/bid/94824	Third Party Advisory VDB Entry
https://github.com/torvalds/linux/commit/79dc7e3f1cd323be4c81aa1a94faa1b3ed987fb2	Issue Tracking Patch Third Party Advisory

URL

CVE-2016-9919

Exploit prediction scoring system (EPSS) score for CVE-2016-9919

Common vulnerability scoring system (CVSS) metrics for CVE-2016-9919

Weakness enumeration for CVE-2016-9919

OS Trackers for CVE-2016-9919

Affected software / configurations for CVE-2016-9919

References for CVE-2016-9919