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 kernel-livepatch-5.15.50-23.125Upgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade kernelUpgrade kernel-develUpgrade bpftool-debuginfoUpgrade kernel-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-tools-develUpgrade python-perfUpgrade kernel-headersUpgrade perf-debuginfoUpgrade kernel-toolsUpgrade perf | May 22, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernel-tools-libsUpgrade python3-perfUpgrade bpftoolUpgrade kernelUpgrade kernel-toolsUpgrade kernel-abi-stablelists | Dec 12, 2025 | Oct 23, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade python3-perfUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-abi-stablelists | Nov 12, 2025 | Oct 23, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel-toolsUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade python3-perf | Oct 24, 2025 | Oct 23, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-azure-5.15Upgrade linux-realtimeUpgrade linux-gcp-5.15Upgrade linux-awsUpgrade linux-gkeopUpgrade linux-raspiUpgrade linux-azure-fde-5.15Upgrade linux-kvmUpgrade linux-hwe-5.15Upgrade linux-nvidiaUpgrade linux-intel-iotg-5.15Upgrade linux-azure-fdeUpgrade linux-ibmUpgrade linux-oracleUpgrade linux-azureUpgrade linux-intel-iotgUpgrade linux-lowlatencyUpgrade linux-riscv-5.15Upgrade linuxUpgrade linux-gkeUpgrade linux-gcpUpgrade linux-lowlatency-hwe-5.15Upgrade linux-aws-5.15Upgrade linux-oracle-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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