Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.5, < 3.12.69 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b98b0bPatchVendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14Release NotesVendor Advisory
- http://www.openwall.com/lists/oss-security/2016/12/03/1Mailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/94655Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037968Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:0931Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0932Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0933Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1402013Issue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/b98b0bc8c431e3ceb4b26b0dfc8db509518fb29PatchVendor Advisory
- https://github.com/xairy/kernel-exploits/tree/master/CVE-2016-9793Third Party Advisory
- https://source.android.com/security/bulletin/2017-03-01.htmlThird Party Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b98b0bPatchVendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14Release NotesVendor Advisory
- http://www.openwall.com/lists/oss-security/2016/12/03/1Mailing ListPatchThird Party Advisory
FAQ
What is CVE-2016-9793?
CVE-2016-9793 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 c...
How severe is CVE-2016-9793?
CVE-2016-9793 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-2016-9793?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.