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UBUNTU-CVE-2017-18017 Critical

UBUNTU-CVE-2017-18017

The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.

Exploit probability Not scored
Published January 3, 2018
Required by Not available
Last source change August 17, 2026

02 / AFFECTED SOFTWARE

Affected packages

Ubuntu:16.04:LTS linux

56 explicit affected versions

Ubuntu:16.04:LTS linux-aws

14 explicit affected versions

Ubuntu:16.04:LTS linux-gcp

5 explicit affected versions

Ubuntu:16.04:LTS linux-gke

12 explicit affected versions

Ubuntu:16.04:LTS linux-hwe

26 explicit affected versions

Ubuntu:16.04:LTS linux-raspi2

32 explicit affected versions

Ubuntu:16.04:LTS linux-snapdragon

29 explicit affected versions

Ubuntu:20.04:LTS linux-azure-fde

26 explicit affected versions

Ubuntu:20.04:LTS linux-gke

51 explicit affected versions

Ubuntu:20.04:LTS linux-raspi2

6 explicit affected versions

Ubuntu:20.04:LTS linux-riscv

12 explicit affected versions

Ubuntu:22.04:LTS linux-intel-iot-realtime

1 explicit affected versions

Ubuntu:22.04:LTS linux-realtime

1 explicit affected versions

Ubuntu:22.04:LTS linux-riscv

23 explicit affected versions

Ubuntu:24.04:LTS linux-azure-6.11

7 explicit affected versions

Ubuntu:24.04:LTS linux-gcp-6.11

7 explicit affected versions

Ubuntu:24.04:LTS linux-hwe-6.11

8 explicit affected versions

Ubuntu:24.04:LTS linux-lowlatency-hwe-6.11

7 explicit affected versions

Ubuntu:24.04:LTS linux-raspi-realtime

1 explicit affected versions

Ubuntu:Pro:20.04:LTS linux-azure-fde-5.15

61 explicit affected versions

Ubuntu:14.04:LTS linux

126 explicit affected versions

Ubuntu:14.04:LTS linux-lts-xenial

34 explicit affected versions

03 / CONNECTIONS

Connected vulnerabilities

related USN-3583-2

04 / EVIDENCE

Source records

Open Source Vulnerabilities UBUNTU-CVE-2017-18017

The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.

View original source

05 / REFERENCES

Further evidence