In the Linux kernel, the following vulnerability has been resolved:
tcp: add accessors to read/set tp->snd_cwnd
We had various bugs over the years with code breaking the assumption that tp->snd_cwnd is greater than zero.
Lately, syzbot reported the WARN_ON_ONCE(!tp->prior_cwnd) added in commit 8b8a321ff72c ("tcp: fix zero cwnd in tcp_cwnd_reduction") can trigger, and without a repro we would have to spend considerable time finding the bug.
Instead of complaining too late, we want to catch where and when tp->snd_cwnd is set to an illegal value.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade python-perf-debuginfoUpgrade perf-debuginfoUpgrade python-perfUpgrade kernel-toolsUpgrade kernel-tools-develUpgrade perfUpgrade kernel-headersUpgrade kernel-livepatch-5.15.50-23.125Upgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade bpftoolUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade bpftool-debuginfoUpgrade kernel-debuginfoUpgrade kernel | May 22, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernel-tools-libsUpgrade bpftoolUpgrade python3-perfUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-tools | Dec 12, 2025 | Oct 23, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade bpftoolUpgrade python3-perfUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernel | Nov 12, 2025 | Oct 23, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade python3-perfUpgrade kernel-tools | Oct 24, 2025 | Oct 23, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-azure-fdeUpgrade linux-raspiUpgrade linux-azureUpgrade linux-awsUpgrade linux-azure-5.15Upgrade linux-gkeopUpgrade linux-realtimeUpgrade linux-azure-fde-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-gcp-5.15Upgrade linux-kvmUpgrade linux-nvidiaUpgrade linux-ibmUpgrade linux-hwe-5.15Upgrade linux-oracleUpgrade linux-intel-iotgUpgrade linux-aws-5.15Upgrade linux-lowlatencyUpgrade linux-gcpUpgrade linux-oracle-5.15Upgrade linux-gkeUpgrade linuxUpgrade linux-lowlatency-hwe-5.15Upgrade linux-riscv-5.15 | Mar 19, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2025 | Feb 26, 2025 |
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