CVE-2016-3955
CRITICALCVSS 9.8/10EPSS 25.93%
Last modified
CVE-2016-3955 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The usbip_recv_xbuff function in drivers/usb/usbip/usbip_common.c in the Linux kernel before 4.5.3 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact via a crafted length value in a USB/IP packet.. EPSS estimates a 25.93% chance of exploitation in the next 30 days.
Description
The usbip_recv_xbuff function in drivers/usb/usbip/usbip_common.c in the Linux kernel before 4.5.3 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact via a crafted length value in a USB/IP packet.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 15.10 |
| Linux | Linux Kernel | < 3.2.80 |
| Linux | Linux Kernel | >= 3.3, < 3.10.102 |
| Linux | Linux Kernel | >= 3.11, < 3.12.59 |
| Linux | Linux Kernel | >= 3.13, < 3.14.68 |
| Linux | Linux Kernel | >= 3.17, < 3.18.37 |
| Linux | Linux Kernel | >= 3.19, < 4.1.28 |
| Linux | Linux Kernel | >= 4.2, < 4.4.9 |
| Linux | Linux Kernel | >= 4.5, < 4.5.3 |
| Debian | Debian Linux | 8.0 |
References
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.htmlMailing List, Third Party Advisory
- http://www.debian.org/security/2016/dsa-3607Third Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.3Vendor Advisory
- http://www.openwall.com/lists/oss-security/2016/04/19/1Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/86534Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-2989-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2996-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2997-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2998-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3000-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3001-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3002-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3003-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3004-1Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1328478Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/b348d7dddb6c4fbfc810b7a0626e8ec9e29f7cbbPatch, Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.htmlMailing List, Third Party Advisory
- http://www.debian.org/security/2016/dsa-3607Third Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.3Vendor Advisory
- http://www.openwall.com/lists/oss-security/2016/04/19/1Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/86534Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-2989-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2996-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2997-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2998-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3000-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3001-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3002-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3003-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3004-1Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1328478Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/b348d7dddb6c4fbfc810b7a0626e8ec9e29f7cbbPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2016-3955?
The usbip_recv_xbuff function in drivers/usb/usbip/usbip_common.c in the Linux kernel before 4.5.3 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact via a crafted length value in a USB/IP packet.
How severe is CVE-2016-3955?
CVE-2016-3955 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 25.93% probability of exploitation in the next 30 days.
How do I fix CVE-2016-3955?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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