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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Linux kernel through 4.14.3 | Linux kernel through 4.14.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.14.7-1 | — |
| Debian 13 | linux | 4.14.7-1 | — |
| Debian 12 | linux | 4.14.7-1 | — |
| Debian 9 | linux | 4.9.65-3+deb9u1 | DSA-4073-1 |
| Debian 8 | linux | 3.16.51-3+deb8u1 | DSA-4082-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | linux | 3.2.96-1 | DLA-1200-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-116.140 | USN-3582-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1052.61 | USN-3582-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.13.0-1011.14 | USN-3581-2 |
| Ubuntu 16.04 LTS | linux-gcp | 4.13.0-1011.15 | USN-3581-2 |
| Ubuntu 16.04 LTS | linux-hwe | 4.13.0-41.46~16.04.1 | USN-3581-2 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1019.24 | USN-3582-1 |
| Ubuntu 16.04 LTS | linux-oem | 4.13.0-1021.23 | USN-3581-2 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1085.93 | USN-3582-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1087.92 | USN-3582-1 |
| Ubuntu 14.04 LTS | linux | 3.13.0-142.191 | USN-3583-1 |
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1014.14 | USN-3582-2 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-116.140~14.04.1 | USN-3582-2 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1005.5 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-862.rt56.804.el7 | RHSA-2018:0676 |
| RHEL 7 | perf +18 | 3.10.0-862.el7 | RHSA-2018:1062 |
| RHEL 6 | perf +16 | 2.6.32-696.28.1.el6 | RHSA-2018:1319 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.4 EUS | perf +18 | 3.10.0-693.25.2.el7 | RHSA-2018:1130 |
| RHEL 7.3 EUS | perf +18 | 3.10.0-514.44.1.el7 | RHSA-2018:0399 |
| RHEL 7.2 TUS | perf +12 | 3.10.0-327.66.1.el7 | RHSA-2018:1216 |
| RHEL 7.2 E4S | perf +12 | 3.10.0-327.66.1.el7 | RHSA-2018:1216 |
| RHEL 7.2 AUS | perf +12 | 3.10.0-327.66.1.el7 | RHSA-2018:1216 |
| RHEL 5 ELS | kernel +12 | 2.6.18-436.el5 | RHSA-2018:3822 |
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-693.25.2.rt56.612.el6rt | RHSA-2018:1170 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-docs +4 | 4.4.103-6.33.1 | SUSE-SU-2017:3398-1 |
| SLES 12 SP2 | kernel-docs +4 | 4.4.103-92.53.1 | SUSE-SU-2017:3410-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.69.1 | SUSE-SU-2018:0031-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_24 | 1-2.3.1 | SUSE-SU-2018:0031-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.111.1 | SUSE-SU-2018:0115-1, SUSE-SU-2018:0031-1 |
| SLES 11 SP4 | kernel-docs | 3.0.101-108.21.2 | SUSE-SU-2018:0011-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-108.21.1 | SUSE-SU-2018:0011-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.106.11.1 | SUSE-SU-2018:0040-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.103-6.33.1 | SUSE-SU-2017:3398-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.103-92.53.1 | SUSE-SU-2017:3410-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.69.1 | SUSE-SU-2018:0031-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_24 | 1-2.3.1 | SUSE-SU-2018:0031-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.21.1 | SUSE-SU-2018:0011-1 |
| SLE Real Time 12 SP2 | kernel-rt +3 | 4.4.104-24.1 | SUSE-SU-2018:0213-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-69.14.1 | SUSE-SU-2018:0180-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_6 | 1-4.3.1 | SUSE-SU-2017:3398-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_16 | 1-3.3.1 | SUSE-SU-2017:3410-1 |
| SUSE OpenStack Cloud 6 | kernel-xen +3 | 3.12.74-60.64.69.1 | SUSE-SU-2018:0031-1 |
| SUSE OpenStack Cloud 6 | kgraft-patch-SLE12-SP1_Update_24 | 1-2.3.1 | SUSE-SU-2018:0031-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.106.11.1 | SUSE-SU-2018:0040-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 5.14.6-1.4 | openSUSE-SU-2024:13704-1, openSUSE-SU-2024:10728-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.20.3.el6uek | 0.4.5-3.el6 | ELSA-2018-4040 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.20.3.el7uek | 0.4.5-3.el7 | ELSA-2018-4040 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.20.3.el7uek | ELSA-2018-4040, ELSA-2018-4025 |
| Oracle Linux 7 | perf +11 | 3.10.0-862.el7 | ELSA-2018-1062 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Linux Kernel 4.10.5 / < 4.14.3 (Ubuntu) - DCCP Socket Use-After-Free EDB-43234 · dos · Dec 7, 2017 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 28
- RHSA-2018:3822 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:1216 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:1170 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:1130 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:1062 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0676 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0399 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:1319 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-3583-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3582-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4073-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4082-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1200-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3581-2 linux-hwe, linux-azure, linux-gcp, linux-oem vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3582-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:3410-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0213-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13704-1 kernel-devel-longterm-6.6.17-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0115-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:3398-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0040-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0031-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0180-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0011-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10728-1 kernel-devel-5.14.6-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2018-1062 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 16, 2018
- ELSA-2018-4040 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 26, 2018
- ELSA-2018-4025 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 7, 2018
References
- DSA-4082 vendor-advisory
- [debian-lts-announce] 20171210 [SECURITY] [DLA 1200-1] linux security update mailing-list
- USN-3583-2 vendor-advisory
- SUSE-SU-2018:0011 vendor-advisory
- USN-3582-1 vendor-advisory
- RHSA-2018:1062 vendor-advisory
- RHSA-2018:1319 vendor-advisory
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
- USN-3583-1 vendor-advisory
- RHSA-2018:0676 vendor-advisory
- RHSA-2018:1216 vendor-advisory
- 43234 exploit
- 102056 vdb-entry
- USN-3581-1 vendor-advisory
- USN-3581-3 vendor-advisory
- RHSA-2018:1170 vendor-advisory
- USN-3581-2 vendor-advisory
- RHSA-2018:1130 vendor-advisory
- RHSA-2018:0399 vendor-advisory
- DSA-4073 vendor-advisory
- RHSA-2018:3822 vendor-advisory
- http://lists.openwall.net/netdev/2017/12/04/224
- USN-3582-2 vendor-advisory
- http://www.openwall.com/lists/oss-security/2017/12/05/1