---
cve: "CVE-2016-9576"
severity: "LOW"
cvss: 3.1
epss: "44%"
vendor: "n/a"
kev: false
exploited: false
published: "2016-12-28 07:42:00"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T23:35:42+02:00"
---

# CVE-2016-9576

> 3.1 LOW · 🧪 PoC

## Beschreibung

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.

## Referenzen

- <http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.html>
- <http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.html>
- <http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac402cfcdc904f9772e1762b3fda112dcc56a0>
- <http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00040.html>
- <https://github.com/torvalds/linux/commit/a0ac402cfcdc904f9772e1762b3fda112dcc56a0>
- <https://access.redhat.com/errata/RHSA-2017:2669>
- <http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.html>
- <http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.html>
- <http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.html>
- <http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.html>
- <http://rhn.redhat.com/errata/RHSA-2017-0817.html>
- <http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.html>
- <https://bugzilla.redhat.com/show_bug.cgi?id=1403145>
- <http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14>
- <http://www.openwall.com/lists/oss-security/2016/12/08/19>
- <https://access.redhat.com/errata/RHSA-2017:2077>
- <https://access.redhat.com/errata/RHSA-2017:1842>
- <http://www.securityfocus.com/bid/94821>
- <http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2016-9576) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_