// For flags

CVE-2016-9576

kernel: Use after free in SCSI generic device interface

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

La función blk_rq_map_user_iov en block/blk-map.c en el kernel de Linux en versiones anteriores a 4.8.14 no restringe adecuadamente el tipo de iterador, lo que permite a usuarios locales leer o escribir a ubicaciones de memoria del kernel arbitrarias o provocar una denegación de servicio (uso después de liberación de memoria) aprovechando acceso a un dispositivo /dev/sg.

It was found that the blk_rq_map_user_iov() function in the Linux kernel's block device implementation did not properly restrict the type of iterator, which could allow a local attacker to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging write access to a /dev/sg device.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
Attack Vector
Local
Attack Complexity
High
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2016-11-23 CVE Reserved
  • 2016-12-28 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-06 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-416: Use After Free
CAPEC
References (20)
URL Tag Source
http://www.securityfocus.com/bid/94821 Third Party Advisory
URL Date SRC
URL Date SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac402cfcdc904f9772e1762b3fda112dcc56a0 2023-02-12
http://www.openwall.com/lists/oss-security/2016/12/08/19 2023-02-12
https://github.com/torvalds/linux/commit/a0ac402cfcdc904f9772e1762b3fda112dcc56a0 2023-02-12
URL Date SRC
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00040.html 2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.html 2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.html 2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.html 2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.html 2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.html 2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.html 2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.html 2023-02-12
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.html 2023-02-12
http://rhn.redhat.com/errata/RHSA-2017-0817.html 2023-02-12
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14 2023-02-12
https://access.redhat.com/errata/RHSA-2017:1842 2023-02-12
https://access.redhat.com/errata/RHSA-2017:2077 2023-02-12
https://access.redhat.com/errata/RHSA-2017:2669 2023-02-12
https://bugzilla.redhat.com/show_bug.cgi?id=1403145 2017-09-06
https://access.redhat.com/security/cve/CVE-2016-9576 2017-09-06
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 4.0 < 4.4.38
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 4.4.38"
-
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 4.5 < 4.8.14
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.8.14"
-
Affected