CVE-2016-9576

Published: Dec 28, 2016Modified: May 6, 2026

7.8

Vector

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

Exploitability: 1.8 / Impact: 5.9

Source: NVD

Description

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.

Affected (2)

Products: Linux: Linux Kernel

Linux

1 product

Linux Kernel

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	From 4.0 to 4.4.38
Linux Linux Kernel	From 4.5 to 4.8.14

Related CWEs

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (38)

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac402cfcdc904f9772e1762b3fda112dcc56a0

Source: secalert@redhat.com

PatchVendor Advisory

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

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.html

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.html

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.html

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.html

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.html

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.html

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.html

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.html

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://rhn.redhat.com/errata/RHSA-2017-0817.html

Source: secalert@redhat.com

Third Party Advisory

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14

Source: secalert@redhat.com

Release NotesVendor Advisory

http://www.openwall.com/lists/oss-security/2016/12/08/19

Source: secalert@redhat.com

Mailing ListPatchThird Party Advisory

http://www.securityfocus.com/bid/94821

Source: secalert@redhat.com

Third Party AdvisoryVDB Entry

https://access.redhat.com/errata/RHSA-2017:1842

Source: secalert@redhat.com

Third Party Advisory

https://access.redhat.com/errata/RHSA-2017:2077

Source: secalert@redhat.com

Third Party Advisory

https://access.redhat.com/errata/RHSA-2017:2669

Source: secalert@redhat.com

Third Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=1403145

Source: secalert@redhat.com

Issue TrackingThird Party Advisory

https://github.com/torvalds/linux/commit/a0ac402cfcdc904f9772e1762b3fda112dcc56a0

Source: secalert@redhat.com

PatchVendor Advisory

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac402cfcdc904f9772e1762b3fda112dcc56a0