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OpenAdvisories
High · 7.5 CVE-2024-41007 EUVD-2024-39356GHSA-2jcw-rxcr-pwmp

tcp: avoid too many retransmit packets

Published Jul 15, 2024 · Updated Aug 5, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: kernel 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-6.8 Package: linux-aws-fips Package: linux-azure 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-6.8 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-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-6.8 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-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-5.4 Package: linux-ibm-6.8 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-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency Package: linux-nvidia-tegra Package: linux-nvidia-tegra-5.15 Package: linux-nvidia-tegra-igx 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-oem-6.8 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-oracle-6.8 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.8 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-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

tcp: avoid too many retransmit packets

If a TCP socket is using TCP_USER_TIMEOUT, and the other peer
retracted its window to zero, tcp_retransmit_timer() can
retransmit a packet every two jiffies (2 ms for HZ=1000),
for about 4 minutes after TCP_USER_TIMEOUT has 'expired'.

The fix is to make sure tcp_rtx_probe0_timed_out() takes
icsk->icsk_user_timeout into account.

Before blamed commit, the socket would not timeout after
icsk->icsk_user_timeout, but would use standard exponential
backoff for the retransmits.

Also worth noting that before commit e89688e3e978 ("net: tcp:
fix unexcepted socket die when snd_wnd is 0"), the issue
would last 2 minutes instead of 4.

Affected products

VendorProductAffectedFixed
Linux Linux 4.19 4.19.318

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.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.9.10-1 —
Debian 13 linux 6.9.10-1 —
Debian 12 linux 6.1.106-1 —
Debian 11 linux 5.10.223-1 DSA-5747-1
Debian 11 linux-6.1 6.1.119-1~deb11u1 DLA-4008-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1052.54 —
Ubuntu 26.04 LTS linux-vmware No fix yet —
Ubuntu 24.04 LTS linux 6.8.0-48.48 USN-7089-1
Ubuntu 24.04 LTS linux-aws 6.8.0-1018.20 USN-7089-3
Ubuntu 24.04 LTS linux-azure 6.8.0-1017.20 USN-7089-2
Ubuntu 24.04 LTS linux-gcp +1 6.8.0-1017.19 USN-7095-1, USN-7089-2
Ubuntu 24.04 LTS linux-gke 6.8.0-1013.17 USN-7089-6
Ubuntu 24.04 LTS linux-gkeop 6.8.0-1002.4 USN-7156-1
Ubuntu 24.04 LTS linux-ibm 6.8.0-1015.15 USN-7089-2
Ubuntu 24.04 LTS linux-lowlatency 6.8.0-48.48.3 USN-7089-7
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1017.19.1 USN-7095-1
Ubuntu 24.04 LTS linux-oem-6.8 6.8.0-1016.16 USN-7089-4
Ubuntu 24.04 LTS linux-oracle 6.8.0-1015.16 USN-7089-3
Ubuntu 24.04 LTS linux-raspi 6.8.0-1014.16 USN-7089-5
Ubuntu 24.04 LTS linux-riscv 6.8.0-48.48.1 —
Ubuntu 24.04 LTS linux-xilinx 6.8.0-1009.10 —
Ubuntu 22.04 LTS linux +1 5.15.0-121.131 USN-7007-3, USN-7007-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1069.75 USN-7007-1
Ubuntu 22.04 LTS linux-aws-6.8 6.8.0-1018.19~22.04.1 USN-7089-3
Ubuntu 22.04 LTS linux-azure 5.15.0-1072.81 USN-7009-1
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1017.20~22.04.1 USN-7090-1
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1072.81.1 USN-7009-1
Ubuntu 22.04 LTS linux-gcp 5.15.0-1068.76 USN-7007-1
Ubuntu 22.04 LTS linux-gcp-6.8 +1 6.8.0-1017.19~22.04.1 USN-7095-1, USN-7089-1
Ubuntu 22.04 LTS linux-gke 5.15.0-1066.72 USN-7007-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1052.59 USN-7007-1
Ubuntu 22.04 LTS linux-hwe-6.8 6.8.0-48.48~22.04.1 USN-7089-1
Ubuntu 22.04 LTS linux-ibm +1 5.15.0-1062.65 USN-7007-1
Ubuntu 22.04 LTS linux-ibm-6.8 +1 6.8.0-1015.15~22.04.1 USN-7089-3
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1064.70 USN-7007-1
Ubuntu 22.04 LTS linux-kvm 5.15.0-1066.71 USN-7007-1
Ubuntu 22.04 LTS linux-lowlatency-hwe-6.8 6.8.0-48.48.3~22.04.1 USN-7089-7
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1064.65 USN-7007-1
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1028.28 —
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1016.16 —
Ubuntu 22.04 LTS linux-oracle 5.15.0-1067.73 USN-7007-1
Ubuntu 22.04 LTS linux-riscv +31 No fix yet —
Ubuntu 22.04 LTS linux-riscv-6.8 6.8.0-48.48.1~22.04.2 —
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1035.39 USN-7019-1
Ubuntu 20.04 LTS linux 5.4.0-195.215 USN-7003-1
Ubuntu 20.04 LTS linux-aws 5.4.0-1132.142 USN-7003-1
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1069.75~20.04.1 USN-7007-1
Ubuntu 20.04 LTS linux-azure 5.4.0-1137.144 USN-7003-1
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1072.81~20.04.1 USN-7009-1
Ubuntu 20.04 LTS linux-azure-fde-5.15 5.15.0-1072.81~20.04.1.1 USN-7009-2
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1092.99 USN-7003-1
Ubuntu 20.04 LTS linux-gcp 5.4.0-1136.145 USN-7003-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1068.76~20.04.1 USN-7007-1
Ubuntu 20.04 LTS linux-gke +26 No fix yet —
Ubuntu 20.04 LTS linux-gkeop 5.4.0-1099.103 USN-7003-1
Ubuntu 20.04 LTS linux-gkeop-5.15 5.15.0-1052.59~20.04.1 USN-7007-1
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-121.131~20.04.1 USN-7007-3, USN-7007-1
Ubuntu 20.04 LTS linux-ibm 5.4.0-1079.84 USN-7003-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1062.65~20.04.1 USN-7007-2
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1064.70~20.04.1 USN-7007-1
Ubuntu 20.04 LTS linux-iot 5.4.0-1043.44 USN-7006-1
Ubuntu 20.04 LTS linux-kvm 5.4.0-1120.128 USN-7003-1
Ubuntu 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1030.30~20.04.1 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1131.140 USN-7003-1
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1067.73~20.04.1 USN-7007-2
Ubuntu 20.04 LTS linux-raspi 5.4.0-1116.128 USN-7003-4
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1065.69~20.04.1 —
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1051.55 USN-7003-3
Show 10 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2013.14 —
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1011.11 —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1063.65 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1070.78 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1011.11~22.04.1 —
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-78.78+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1069.75+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1072.81+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-121.131+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1068.76+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1132.142+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1137.144+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1106.116 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1136.145+fips1 —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro 18.04 LTS linux-aws-5.4 5.4.0-1132.142~18.04.1 USN-7003-2
Ubuntu Pro 18.04 LTS linux-azure-5.4 5.4.0-1137.144~18.04.1 USN-7003-2
Ubuntu Pro 18.04 LTS linux-gcp-5.4 5.4.0-1136.145~18.04.1 USN-7003-2
Ubuntu Pro 18.04 LTS linux-hwe-5.4 5.4.0-195.215~18.04.1 USN-7003-2
Ubuntu Pro 18.04 LTS linux-ibm-5.4 5.4.0-1079.84~18.04.1 USN-7003-2
Ubuntu Pro 18.04 LTS linux-oracle-5.4 5.4.0-1131.140~18.04.1 USN-7003-2
Ubuntu Pro 18.04 LTS linux-raspi-5.4 5.4.0-1116.128~18.04.1 USN-7003-5
ReleasePackageFixed inAdvisory
RHEL 9 bpftool 7.4.0-503.11.1.el9_5 RHSA-2024:9315
RHEL 9 rv +67 5.14.0-503.11.1.el9_5 RHSA-2024:9315
RHEL 8 kernel-rt +12 4.18.0-553.22.1.rt7.363.el8_10 RHSA-2024:7001
RHEL 8 perf +26 4.18.0-553.22.1.el8_10 RHSA-2024:7000
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 9.4 EUS bpftool 7.3.0-427.47.1.el9_4 RHSA-2024:10771
RHEL 9.4 EUS rv +64 5.14.0-427.47.1.el9_4 RHSA-2024:10771

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 8 kernel-rt +11 4.18.0-553.22.1.rt7.363.el8_10 ALSA-2024:7001
AlmaLinux 8 perf +24 4.18.0-553.22.1.el8_10 ALSA-2024:7000

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 kernel 4.18.0-553.22.1.el8_10 RLSA-2024:7000
Rocky Linux 8 kernel-rt 4.18.0-553.22.1.rt7.363.el8_10 RLSA-2024:7001
ReleasePackageFixed inAdvisory
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.22.1 SUSE-SU-2024:3383-1
SLES 15 SP6 kernel-azure +2 6.4.0-150600.8.11.1 SUSE-SU-2024:3194-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.22.1.150600.12.8.3 SUSE-SU-2024:3383-1
SLES 15 SP5 kernel-64kb +4 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
SLES 15 SP5 kernel-azure +2 5.14.21-150500.33.66.1 SUSE-SU-2024:3190-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
SLES 15 SP5 kernel-syms +1 5.14.21-150500.55.80.1 SUSE-SU-2024:3483-1
SLES 12 SP5 kernel-syms +2 4.12.14-122.293.1 SUSE-SU-2026:0473-1
Show 7 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLE Micro 6.0 kernel-default-base 6.4.0-17.1.1.51 SUSE-SU-2025:20044-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_2 +1 1-1.1 SUSE-SU-2025:20047-1, SUSE-SU-2025:20044-1
SLE Micro 6.0 kernel-rt +1 6.4.0-10.1 SUSE-SU-2025:20047-1
SLE Micro 6.0 kernel-source +2 6.4.0-19.1 SUSE-SU-2025:20044-1
SLE Micro 5.5 kernel-default 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.22.1 SUSE-SU-2024:3383-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_2 1-150600.1.3.2 SUSE-SU-2024:3195-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_4 1-150600.13.3.3 SUSE-SU-2024:3383-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_19 +1 1-150500.11.3.2 SUSE-SU-2024:3483-1, SUSE-SU-2024:3209-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.293.1 SUSE-SU-2026:0473-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_77 1-8.3.1 SUSE-SU-2026:0473-1
SUSE Real Time Module 15 SP6 kernel-rt +2 6.4.0-150600.10.8.3 SUSE-SU-2024:3195-1
SUSE Real Time Module 15 SP6 kernel-syms-rt 6.4.0-150600.10.8.1 SUSE-SU-2024:3195-1
SUSE Real Time Module 15 SP5 kernel-rt +2 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1
SUSE Real Time Module 15 SP5 kernel-syms-rt 5.14.21-150500.13.67.1 SUSE-SU-2024:3209-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.22.1 SUSE-SU-2024:3383-1
openSUSE Leap 15.6 kernel-azure +2 6.4.0-150600.8.11.1 SUSE-SU-2024:3194-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.22.1.150600.12.8.3 SUSE-SU-2024:3383-1
openSUSE Leap 15.6 kernel-rt +2 6.4.0-150600.10.8.3 SUSE-SU-2024:3195-1
openSUSE Leap 15.6 kernel-syms-rt 6.4.0-150600.10.8.1 SUSE-SU-2024:3195-1
openSUSE Leap 15.5 dtb-aarch64 +3 5.14.21-150500.55.80.1 SUSE-SU-2024:3483-1
openSUSE Leap 15.5 kernel-64kb +6 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
openSUSE Leap 15.5 kernel-azure +2 5.14.21-150500.33.66.1 SUSE-SU-2024:3190-1
openSUSE Leap 15.5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
openSUSE Leap 15.5 kernel-rt +2 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1
openSUSE Leap 15.5 kernel-syms-rt 5.14.21-150500.13.67.1 SUSE-SU-2024:3209-1
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
openSUSE Leap Micro 5.5 kernel-default 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
openSUSE Leap Micro 5.5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
openSUSE Leap Micro 5.5 kernel-rt 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.102-108.177 1.0-0.amzn2023 ALAS2023-2024-679
Amazon Linux 2023 perf +14 6.1.102-108.177.amzn2023 ALAS2023-2024-679

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 kernel 6.6.43.1-7 —
Azure Linux 2 (CBL-Mariner) kernel 5.15.164.1-1 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 bpftool 7.4.0-503.11.1.el9_5 ELSA-2024-9315
Oracle Linux 9 rv +28 5.14.0-503.11.1.el9_5 ELSA-2024-9315
Oracle Linux 8 kernel-uek +12 5.15.0-210.163.7.el9uek ELSA-2024-12618
Oracle Linux 8 perf +19 4.18.0-553.22.1.el8_10 ELSA-2024-12618, ELSA-2024-7000
Oracle Linux 7 kernel-uek +4 5.4.17-2136.335.4.el8uek ELSA-2024-12610
Oracle Linux 7 kernel-uek-container +1 5.4.17-2136.335.4.el8 ELSA-2024-12612
Oracle Linux 7 perf +3 5.4.17-2136.335.4.el7uek ELSA-2024-12610

Advisories 50

References