CVE-2017-8824

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2017-12-05 · updated 2026-06-17
Weakness: CWE-416

Description

The dccp_disconnect function in net/dccp/proto.c in the Linux kernel through 4.14.3 allows local users to gain privileges or cause a denial of service (use-after-free) via an AF_UNSPEC connect system call during the DCCP_LISTEN state.

Affected products

Linux kernel: from 2.6.14 before 3.2.97; from 3.3 before 3.16.52; from 3.17 before 3.18.95; from 3.19 before 4.1.50; from 4.2 before 4.4.116; from 4.5 before 4.9.82 — fixed in 3.16.52, 3.18.95, 3.2.97, 4.1.50, 4.14.20, 4.4.116

How to fix

Upgrade to a fixed version: Linux kernel 3.16.52, 3.18.95, 3.2.97, 4.1.50. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
http://lists.openwall.net/netdev/2017/12/04/224
http://www.openwall.com/lists/oss-security/2017/12/05/1
http://www.securityfocus.com/bid/102056
https://access.redhat.com/errata/RHSA-2018:0399
https://access.redhat.com/errata/RHSA-2018:0676
https://access.redhat.com/errata/RHSA-2018:1062
https://access.redhat.com/errata/RHSA-2018:1130
https://access.redhat.com/errata/RHSA-2018:1170
https://access.redhat.com/errata/RHSA-2018:1216
https://access.redhat.com/errata/RHSA-2018:1319
https://access.redhat.com/errata/RHSA-2018:3822

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