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,…
- 7.8HighCVSS base score
- 1.6%Exploitation in 30 daysEPSS · top 25% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
Description
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list an Exploit-DB entry for it.
Show the exploits1
Exploit-DB1 entry
- Linux Kernel 3.11 < 4.8 0 - 'SO_SNDBUFFORCE' / 'SO_RCVBUFFORCE' Local Privilege Escalation (Exploit-DB entry) (opens in a new tab)
EDB-ID 41995local, linuxpublished 22 Mar 2017Not verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 26 days later
· 26 days later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.6% · top 25% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
n/a
- affected n/a
References
12
- https://github.com/torvalds/linux/commit/b98b0bc8c431e3ceb4b26b0dfc8db509518fb290 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1037968 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b98b0bc8c431e3ceb4b26b0dfc8db509518fb290 (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2017:0932 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://github.com/xairy/kernel-exploits/tree/master/CVE-2016-9793 (opens in a new tab)x_refsource_MISCx_transferred
- 94655 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- [oss-security] 20161202 Re: CVE Request: Linux: signed overflows for SO_{SND|RCV}BUFFORCE (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14 (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2017:0933 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:0931 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://source.android.com/security/bulletin/2017-03-01.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=1402013 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2016-10594 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-9793)Record last updated .