Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.0, < 4.4.38 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac40PatchVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00040.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.htmlMailing ListThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2017-0817.htmlThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14Release NotesVendor Advisory
- http://www.openwall.com/lists/oss-security/2016/12/08/19Mailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/94821Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
FAQ
What is CVE-2016-9576?
CVE-2016-9576 is a vulnerability with a CVSS score of 7.8 (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 mem...
How severe is CVE-2016-9576?
CVE-2016-9576 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-9576?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.