Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- CVSS 3.0 Base Score: 5.3
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-kernelamazon-linux-ami-2-upgrade-kernel-debuginfoamazon-linux-ami-2-upgrade-kernel-debuginfo-common-aarch64amazon-linux-ami-2-upgrade-kernel-debuginfo-common-x86_64amazon-linux-ami-2-upgrade-kernel-develamazon-linux-ami-2-upgrade-kernel-headersamazon-linux-ami-2-upgrade-kernel-toolsamazon-linux-ami-2-upgrade-kernel-tools-debuginfoamazon-linux-ami-2-upgrade-kernel-tools-develamazon-linux-ami-2-upgrade-perfamazon-linux-ami-2-upgrade-perf-debuginfoamazon-linux-ami-2-upgrade-python-perfamazon-linux-ami-2-upgrade-python-perf-debuginfo | Apr 27, 2020 | Jun 19, 2019 | |
| Amazon_linux | — | amazon-linux-upgrade-kernel | Jun 18, 2019 | Jun 13, 2019 |
| Arch Linux | View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗View advisory ↗ | arch-linux-upgrade-latest | Jul 11, 2025 | Jun 18, 2019 |
| Centos_linux | — | centos-upgrade-kernelcentos-upgrade-kernel-rt | Jun 19, 2019 | Jun 17, 2019 |
| Debian | debian-upgrade-linux | Jun 18, 2019 | Jun 18, 2019 | |
| F5 Big Ip | f5-bigip-upgrade-latest | Jun 17, 2026 | Jun 19, 2019 | |
| Huawei Euleros 2_0_sp2 | huawei-euleros-2_0_sp2-upgrade-kernelhuawei-euleros-2_0_sp2-upgrade-kernel-debughuawei-euleros-2_0_sp2-upgrade-kernel-debug-develhuawei-euleros-2_0_sp2-upgrade-kernel-debuginfohuawei-euleros-2_0_sp2-upgrade-kernel-debuginfo-common-x86_64huawei-euleros-2_0_sp2-upgrade-kernel-develhuawei-euleros-2_0_sp2-upgrade-kernel-headershuawei-euleros-2_0_sp2-upgrade-kernel-toolshuawei-euleros-2_0_sp2-upgrade-kernel-tools-libshuawei-euleros-2_0_sp2-upgrade-perfhuawei-euleros-2_0_sp2-upgrade-python-perf | Jun 27, 2019 | Jun 19, 2019 | |
| Huawei Euleros 2_0_sp3 | huawei-euleros-2_0_sp3-upgrade-kernelhuawei-euleros-2_0_sp3-upgrade-kernel-debuginfohuawei-euleros-2_0_sp3-upgrade-kernel-debuginfo-common-x86_64huawei-euleros-2_0_sp3-upgrade-kernel-develhuawei-euleros-2_0_sp3-upgrade-kernel-headershuawei-euleros-2_0_sp3-upgrade-kernel-toolshuawei-euleros-2_0_sp3-upgrade-kernel-tools-libshuawei-euleros-2_0_sp3-upgrade-perfhuawei-euleros-2_0_sp3-upgrade-python-perf | Jun 27, 2019 | Jun 19, 2019 | |
| Huawei Euleros 2_0_sp5 | huawei-euleros-2_0_sp5-upgrade-kernelhuawei-euleros-2_0_sp5-upgrade-kernel-debuginfohuawei-euleros-2_0_sp5-upgrade-kernel-debuginfo-common-x86_64huawei-euleros-2_0_sp5-upgrade-kernel-develhuawei-euleros-2_0_sp5-upgrade-kernel-headershuawei-euleros-2_0_sp5-upgrade-kernel-toolshuawei-euleros-2_0_sp5-upgrade-kernel-tools-libshuawei-euleros-2_0_sp5-upgrade-perfhuawei-euleros-2_0_sp5-upgrade-python-perf | Jul 2, 2019 | Jun 19, 2019 | |
| Huawei Euleros 2_0_sp8 | huawei-euleros-2_0_sp8-upgrade-kernelhuawei-euleros-2_0_sp8-upgrade-kernel-debuginfohuawei-euleros-2_0_sp8-upgrade-kernel-debuginfo-common-aarch64huawei-euleros-2_0_sp8-upgrade-kernel-develhuawei-euleros-2_0_sp8-upgrade-kernel-headershuawei-euleros-2_0_sp8-upgrade-kernel-toolshuawei-euleros-2_0_sp8-upgrade-kernel-tools-libshuawei-euleros-2_0_sp8-upgrade-perfhuawei-euleros-2_0_sp8-upgrade-python-perf | Jul 26, 2019 | Jun 19, 2019 | |
| Oracle_linux | — | oracle-linux-upgrade-kerneloracle-linux-upgrade-kernel-uek | Jun 18, 2019 | Jun 17, 2019 |
| Panos | palo-alto-networks-pan-os-upgrade-7-1palo-alto-networks-pan-os-upgrade-8-0palo-alto-networks-pan-os-upgrade-8-1palo-alto-networks-pan-os-upgrade-9-0 | Jun 28, 2019 | Jun 17, 2019 | |
| Pulse Secure Pulse Connect Secure | pulse-secure-pulse-connect-secure-upgrade-9_0r5pulse-secure-pulse-connect-secure-upgrade-9_1r3pulse-secure-pulse-connect-secure-upgrade-9_1r5 | Oct 28, 2020 | Jun 19, 2019 | |
| Redhat Openshift | linuxrpm-upgrade-redhat-coreos | Dec 29, 2020 | Jun 19, 2019 | |
| Redhat_linux | redhat-upgrade-kernelredhat-upgrade-kernel-rt | Jun 18, 2019 | Jun 17, 2019 | |
| Suse | — | suse-upgrade-kernel-defaultsuse-upgrade-kernel-default-extrasuse-upgrade-kernel-docssuse-upgrade-kernel-obs-build | Jun 18, 2019 | Jun 17, 2019 |
| Ubuntu | ubuntu-upgrade-linux-image-4-15-0-1017-oracleubuntu-upgrade-linux-image-4-15-0-1036-gcpubuntu-upgrade-linux-image-4-15-0-1036-gkeubuntu-upgrade-linux-image-4-15-0-1038-kvmubuntu-upgrade-linux-image-4-15-0-1040-raspi2ubuntu-upgrade-linux-image-4-15-0-1043-awsubuntu-upgrade-linux-image-4-15-0-1045-oemubuntu-upgrade-linux-image-4-15-0-1049-azureubuntu-upgrade-linux-image-4-15-0-1057-snapdragonubuntu-upgrade-linux-image-4-15-0-54-genericubuntu-upgrade-linux-image-4-15-0-54-generic-lpaeubuntu-upgrade-linux-image-4-15-0-54-lowlatencyubuntu-upgrade-linux-image-4-18-0-1015-gcpubuntu-upgrade-linux-image-4-18-0-1016-kvmubuntu-upgrade-linux-image-4-18-0-1018-raspi2ubuntu-upgrade-linux-image-4-18-0-1020-awsubuntu-upgrade-linux-image-4-18-0-1023-azureubuntu-upgrade-linux-image-4-18-0-25-genericubuntu-upgrade-linux-image-4-18-0-25-generic-lpaeubuntu-upgrade-linux-image-4-18-0-25-lowlatencyubuntu-upgrade-linux-image-4-18-0-25-snapdragonubuntu-upgrade-linux-image-4-4-0-1048-awsubuntu-upgrade-linux-image-4-4-0-1051-kvmubuntu-upgrade-linux-image-4-4-0-1087-awsubuntu-upgrade-linux-image-4-4-0-1114-raspi2ubuntu-upgrade-linux-image-4-4-0-1118-snapdragonubuntu-upgrade-linux-image-4-4-0-154-genericubuntu-upgrade-linux-image-4-4-0-154-generic-lpaeubuntu-upgrade-linux-image-4-4-0-154-lowlatencyubuntu-upgrade-linux-image-4-4-0-154-powerpc-e500mcubuntu-upgrade-linux-image-4-4-0-154-powerpc-smpubuntu-upgrade-linux-image-4-4-0-154-powerpc64-embubuntu-upgrade-linux-image-4-4-0-154-powerpc64-smpubuntu-upgrade-linux-image-5-0-0-1010-awsubuntu-upgrade-linux-image-5-0-0-1010-azureubuntu-upgrade-linux-image-5-0-0-1010-gcpubuntu-upgrade-linux-image-5-0-0-1010-kvmubuntu-upgrade-linux-image-5-0-0-1012-raspi2ubuntu-upgrade-linux-image-5-0-0-1016-snapdragonubuntu-upgrade-linux-image-5-0-0-20-genericubuntu-upgrade-linux-image-5-0-0-20-generic-lpaeubuntu-upgrade-linux-image-5-0-0-20-lowlatencyubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-aws-hweubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-hwe-16-04ubuntu-upgrade-linux-image-generic-hwe-18-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-generic-lpae-hwe-16-04ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04ubuntu-upgrade-linux-image-generic-lpae-lts-xenialubuntu-upgrade-linux-image-generic-lts-xenialubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-gke-4-15ubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-hwe-16-04ubuntu-upgrade-linux-image-lowlatency-hwe-18-04ubuntu-upgrade-linux-image-lowlatency-lts-xenialubuntu-upgrade-linux-image-oemubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-powerpc-e500mcubuntu-upgrade-linux-image-powerpc-e500mc-lts-xenialubuntu-upgrade-linux-image-powerpc-smpubuntu-upgrade-linux-image-powerpc-smp-lts-xenialubuntu-upgrade-linux-image-powerpc64-embubuntu-upgrade-linux-image-powerpc64-emb-lts-xenialubuntu-upgrade-linux-image-powerpc64-smpubuntu-upgrade-linux-image-powerpc64-smp-lts-xenialubuntu-upgrade-linux-image-raspi2ubuntu-upgrade-linux-image-snapdragonubuntu-upgrade-linux-image-snapdragon-hwe-18-04ubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-16-04ubuntu-upgrade-linux-image-virtual-hwe-18-04ubuntu-upgrade-linux-image-virtual-lts-xenial | Jun 29, 2019 | Jun 17, 2019 | |
| Vmware Photon_os | vmware-photon_os_update_tdnf | Jan 20, 2025 | Jun 18, 2019 |
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