CVE-2017-16939

high

Published 2017-11-24 · Modified 2026-05-13

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CVSS v3

7.8

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

8.8

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.

Predictions

Exploit likelihood

75%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-44049 local linux

SecuriTeam · 2017-11-23

Linux Kernel (Ubuntu 17.04) - 'XFRM' Local Privilege Escalation

Source code queued for fetch — refresh in a moment.

OS impact

OS	Version	Status	Fixed in
sles		affected
debian	bookworm	fixed	`4.13.13-1`
debian	bullseye	fixed	`4.13.13-1`
debian	forky	fixed	`4.13.13-1`
debian	sid	fixed	`4.13.13-1`
debian	trixie	fixed	`4.13.13-1`
debian	8.0	affected
linux-kernel		affected	`3.2.97`

References

CWEs

CWE-416

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.