Medium · 4.7 CVE-2022-49597 EUVD-2022-54635GHSA-3vvj-5p8f-5c28

tcp: Fix data-races around sysctl_tcp_base_mss.

Published Feb 26, 2025 · Updated May 11, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.4 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-fips Package: linux-aws-hwe Package: linux-azure Package: linux-azure-4.15 Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.4 Package: linux-azure-5.8 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-4.15 Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.4 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.4 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.4 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-iot Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lts-xenial Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.5 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.4 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

In the Linux kernel, the following vulnerability has been resolved:

tcp: Fix data-races around sysctl_tcp_base_mss.

While reading sysctl_tcp_base_mss, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its readers.

Affected products

Vendor	Product	Affected	Fixed
Linux	Linux	2.6.17	5.4.208

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	5.18.16-1	—
Debian 13	linux	5.18.16-1	—
Debian 12	linux	5.18.16-1	—

Ubuntu

Security tracker ↗

Release	Package	Fixed in	Advisory
Ubuntu 24.04 LTS	linux-raspi-realtime	No fix yet	—
Ubuntu 22.04 LTS	linux +1	5.15.0-50.56	—
Ubuntu 22.04 LTS	linux-aws	5.15.0-1021.25	—
Ubuntu 22.04 LTS	linux-azure	5.15.0-1021.26	—
Ubuntu 22.04 LTS	linux-azure-fde	5.15.0-1024.30.1	—
Ubuntu 22.04 LTS	linux-gcp	5.15.0-1019.25	—
Ubuntu 22.04 LTS	linux-gke	5.15.0-1017.20	—
Ubuntu 22.04 LTS	linux-gkeop	5.15.0-1004.6	—
Ubuntu 22.04 LTS	linux-ibm	5.15.0-1015.17	—
Ubuntu 22.04 LTS	linux-intel-iotg	5.15.0-1017.22	—
Ubuntu 22.04 LTS	linux-kvm	5.15.0-1019.23	—
Ubuntu 22.04 LTS	linux-nvidia	5.15.0-1015.15	—
Ubuntu 22.04 LTS	linux-oracle	5.15.0-1019.24	—
Ubuntu 22.04 LTS	linux-raspi	5.15.0-1016.18	—
Ubuntu 22.04 LTS	linux-riscv +32	No fix yet	—
Ubuntu 20.04 LTS	linux	5.4.0-128.144	—
Ubuntu 20.04 LTS	linux-aws	5.4.0-1086.93	—
Ubuntu 20.04 LTS	linux-aws-5.15	5.15.0-1021.25~20.04.1	—
Ubuntu 20.04 LTS	linux-azure	5.4.0-1094.100	—
Ubuntu 20.04 LTS	linux-azure-5.15	5.15.0-1021.26~20.04.1	—
Ubuntu 20.04 LTS	linux-bluefield	5.4.0-1047.52	—
Ubuntu 20.04 LTS	linux-gcp	5.4.0-1090.98	—
Ubuntu 20.04 LTS	linux-gcp-5.15	5.15.0-1021.28~20.04.1	—
Ubuntu 20.04 LTS	linux-gke +28	No fix yet	—
Ubuntu 20.04 LTS	linux-hwe-5.15 +1	5.15.0-50.56~20.04.1	—
Ubuntu 20.04 LTS	linux-ibm	5.4.0-1034.38	—
Ubuntu 20.04 LTS	linux-intel-iotg-5.15	5.15.0-1017.22~20.04.1	—
Ubuntu 20.04 LTS	linux-iot	5.4.0-1005.7	—
Ubuntu 20.04 LTS	linux-kvm	5.4.0-1076.81	—
Ubuntu 20.04 LTS	linux-oracle	5.4.0-1084.92	—
Ubuntu 20.04 LTS	linux-oracle-5.15	5.15.0-1019.24~20.04.1	—
Ubuntu 20.04 LTS	linux-raspi	5.4.0-1071.81	—
Ubuntu 20.04 LTS	linux-riscv-5.15	5.15.0-1022.26~20.04.1	—
Ubuntu 18.04 LTS	linux-aws-5.4	5.4.0-1086.93~18.04.1	—
Ubuntu 18.04 LTS	linux-azure-5.4	5.4.0-1094.100~18.04.1	—
Ubuntu 18.04 LTS	linux-gcp +14	No fix yet	—
Ubuntu 18.04 LTS	linux-gcp-5.4	5.4.0-1092.101~18.04.1	—
Ubuntu 18.04 LTS	linux-hwe-5.4	5.4.0-128.144~18.04.1	—
Ubuntu 18.04 LTS	linux-ibm-5.4	5.4.0-1034.38~18.04.1	—
Ubuntu 18.04 LTS	linux-oracle-5.4	5.4.0-1084.92~18.04.1	—
Ubuntu 18.04 LTS	linux-raspi-5.4	5.4.0-1071.81~18.04.1	—
Ubuntu 16.04 LTS	linux-hwe-edge	No fix yet	—

Show 10 more (older releases, extended support, other products)

Release	Package	Fixed in	Advisory
Ubuntu Pro Realtime 22.04 LTS	linux-realtime	5.15.0-1022.22	—
Ubuntu Pro FIPS 20.04 LTS	linux-fips +3	No fix yet	—
Ubuntu Pro FIPS 18.04 LTS	linux-fips +3	No fix yet	—
Ubuntu Pro FIPS 16.04 LTS	linux-fips	No fix yet	—
Ubuntu Pro FIPS-updates 20.04 LTS	linux-aws-fips	5.4.0-1086.93+fips1	—
Ubuntu Pro FIPS-updates 20.04 LTS	linux-azure-fips	5.4.0-1094.100+fips1	—
Ubuntu Pro FIPS-updates 20.04 LTS	linux-fips	5.4.0-1062.70	—
Ubuntu Pro FIPS-updates 20.04 LTS	linux-gcp-fips	5.4.0-1092.101+fips1	—
Ubuntu Pro FIPS-updates 18.04 LTS	linux-fips +3	No fix yet	—
Ubuntu Pro FIPS-updates 16.04 LTS	linux-fips	No fix yet	—
Ubuntu Pro 18.04 LTS	linux +5	No fix yet	—
Ubuntu Pro 16.04 LTS	linux +7	No fix yet	—
Ubuntu Pro 14.04 LTS	linux +3	No fix yet	—

References