CVE-2017-16939
HIGHCVSS 7.8/10EPSS 2.15%
Last modified
CVE-2017-16939 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.. EPSS estimates a 2.15% chance of exploitation in the next 30 days.
Description
The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.28, < 3.2.97 |
| Linux | Linux Kernel | >= 3.3, < 3.16.52 |
| Linux | Linux Kernel | >= 3.17, < 3.18.86 |
| Linux | Linux Kernel | >= 3.19, < 4.1.48 |
| Linux | Linux Kernel | >= 4.2, < 4.4.104 |
| Linux | Linux Kernel | >= 4.5, < 4.9.60 |
| Linux | Linux Kernel | >= 4.10, < 4.13.11 |
| Debian | Debian Linux | 8.0 |
References
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.htmlMailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2017/Nov/40Mailing List, Third Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11Patch, Vendor Advisory
- http://www.securityfocus.com/bid/101954Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1318Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1355Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1170Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1190Third Party Advisory
- https://blogs.securiteam.com/index.php/archives/3535Exploit, Patch, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1069702Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/1137b5e2529a8f5ca8ee709288ecba3e68044df2Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00004.htmlThird Party Advisory
- https://www.debian.org/security/2018/dsa-4082Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.htmlMailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2017/Nov/40Mailing List, Third Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11Patch, Vendor Advisory
- http://www.securityfocus.com/bid/101954Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1318Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1355Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1170Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1190Third Party Advisory
- https://blogs.securiteam.com/index.php/archives/3535Exploit, Patch, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1069702Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/1137b5e2529a8f5ca8ee709288ecba3e68044df2Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00004.htmlThird Party Advisory
- https://www.debian.org/security/2018/dsa-4082Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2017-16939?
The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.
How severe is CVE-2017-16939?
CVE-2017-16939 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 2.15% probability of exploitation in the next 30 days.
How do I fix CVE-2017-16939?
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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