CVE-2017-13715

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 9.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-08-29 · updated 2026-06-17
Weakness: CWE-665

Description

The __skb_flow_dissect function in net/core/flow_dissector.c in the Linux kernel before 4.3 does not ensure that n_proto, ip_proto, and thoff are initialized, which allows remote attackers to cause a denial of service (system crash) or possibly execute arbitrary code via a single crafted MPLS packet.

Affected products

Linux kernel: from 4.2 before 4.3 — fixed in 4.3

How to fix

Upgrade to a fixed version: Linux kernel 4.3. Check the vendor advisory for mitigations.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6e544b0a88b53114bfa5a57e21b7be7a8dfc9d0
http://seclists.org/oss-sec/2017/q3/345
http://www.securityfocus.com/bid/100517
https://github.com/torvalds/linux/commit/a6e544b0a88b53114bfa5a57e21b7be7a8dfc9d0
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6e544b0a88b53114bfa5a57e21b7be7a8dfc9d0
http://seclists.org/oss-sec/2017/q3/345
http://www.securityfocus.com/bid/100517
https://github.com/torvalds/linux/commit/a6e544b0a88b53114bfa5a57e21b7be7a8dfc9d0

Get alerted when CVE-2017-13715 or the next vulnerability affects your stack