Buffer overflow in Linux Kernel
CVE-2016-9793
The sock_setsockopt function in net/core/sock.c in the Linux kernel before 4.8.14 mishandles negative values of sk_sndbuf and sk_rcvbuf, which allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option.
Vulnerability class: Buffer Overflow
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: 0.016 (74.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/torvalds/linux/commit/b98b0bc8c431e3ceb4b26b0dfc8db509518fb290 (Patch, Vendor Advisory)
- www.securitytracker.com/id/1037968 (VDB Entry, Third Party Advisory, vdb-entry)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- access.redhat.com/errata/RHSA-2017:0932 (vendor-advisory, Third Party Advisory)
- github.com/xairy/kernel-exploits/tree/master/CVE-2016-9793 (Third Party Advisory)
- www.securityfocus.com/bid/94655 (VDB Entry, Third Party Advisory, vdb-entry)
- www.openwall.com/lists/oss-security/2016/12/03/1 (mailing-list, Patch, Mailing List, Third Party Advisory)
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14 (Release Notes, Vendor Advisory)
- access.redhat.com/errata/RHSA-2017:0933 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:0931 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-9793?
- CVE-2016-9793 is a high-severity vulnerability in Linux Kernel, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2016-12-28.
- How severe is CVE-2016-9793?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2016-9793 known to be exploited?
- 53 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.