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…
Does this matter?
A public exploit is published in Exploit-DB and the impact is high, while EPSS rates exploitation at 2.1%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.15% probability · 82th percentile
- Public exploits
- 1 in Exploit-DB · first 23 November 2017
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel · debian/debian linux
- Source
- cve@mitre.org
EPSS 2.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5e2529a8f5ca8ee709288ecba3e68044df2Patch, Technical Description
- 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://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5e2529a8f5ca8ee709288ecba3e68044df2Patch, Technical Description
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.