Use After Free in Linux Kernel
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 (use-after-free) by leveraging access to a /dev/sg device.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.html (vendor-advisory, Mailing List, Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00040.html (vendor-advisory, Mailing List, Third Party Advisory)
- github.com/torvalds/linux/commit/a0ac402cfcdc904f9772e1762b3fda112dcc56a0 (Patch, Vendor Advisory)
- access.redhat.com/errata/RHSA-2017:2669 (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.html (vendor-advisory, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-9576?
- CVE-2016-9576 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2016-12-28.
- How severe is CVE-2016-9576?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2016-9576 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.