What is CVE-2016-9576?

CVE-2016-9576 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2016-9576 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2016-9576?

CVE-2016-9576 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2016-9576?

No patch is currently available for CVE-2016-9576. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2016-9576 actively exploited?

CVE-2016-9576 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2016-9576

High

The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 4.8.14 does not properly restrict the type of iterator, which allows local users to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging access to a /dev/sg device.

Package Linux Kernel

Published 2016-12-28

Last modified 2026-05-06

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2016-9576 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2016-9576 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Lists
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00040.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.html

Mailing List Third Party Advisory
Red Hat
http://rhn.redhat.com/errata/RHSA-2017-0817.html

Third Party Advisory
Kernel.org
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14

Release Notes Vendor Advisory
Securityfocus
http://www.securityfocus.com/bid/94821

Third Party Advisory VDB Entry
Red Hat
https://access.redhat.com/errata/RHSA-2017:1842

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2017:2077

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2017:2669

Third Party Advisory
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1403145

Issue Tracking Third Party Advisory
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac402cfcdc904f9772e1762b3fda112dcc56a0
Patch
Kernel patch commit
http://www.openwall.com/lists/oss-security/2016/12/08/19
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/a0ac402cfcdc904f9772e1762b3fda112dcc56a0
Patch

Details

CVE ID CVE-2016-9576

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2016-12-28

Modified 2026-05-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2016-9576?

CVE-2016-9576 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2016-9576 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2016-9576?

CVE-2016-9576 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2016-9576?

No patch is currently available for CVE-2016-9576. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2016-9576 actively exploited?

No — CVE-2016-9576 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →