VulnerabilityModified
CVE-2016-9576
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…
HIGH 7.8EPSS 0.44%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.44% probability · 37th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- secalert@redhat.com
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac402cfcdc904f9772e1762b3fda112dcc56a0Patch, Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00040.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.htmlMailing List, Third 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 Notes, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2016/12/08/19Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/94821Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2669Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1403145Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/a0ac402cfcdc904f9772e1762b3fda112dcc56a0Patch, Vendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac402cfcdc904f9772e1762b3fda112dcc56a0Patch, Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00040.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.htmlMailing List, Third Party Advisory
- http://rhn.redhat.com/errata/RHSA-2017-0817.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.