In the Linux kernel, the following vulnerability has been resolved:
tcp: secure_seq: add back ports to TS offset
This reverts 28ee1b746f49 ("secure_seq: downgrade to per-host timestamp offsets")
tcp_tw_recycle went away in 2017.
Zhouyan Deng reported off-path TCP source port leakage via SYN cookie side-channel that can be fixed in multiple ways.
One of them is to bring back TCP ports in TS offset randomization.
As a bonus, we perform a single siphash() computation to provide both an ISN and a TS offset.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.18-develUpgrade kernel6.18-libbpf-debuginfoUpgrade bpftool6.18Upgrade kernel6.18-libbpfUpgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.18-modules-extra-commonUpgrade kernel6.18-tools-develUpgrade kernel6.18Upgrade kernel6.18-libbpf-staticUpgrade perf6.18Upgrade kernel6.18-modules-extraUpgrade kernel6.18-libbpf-develUpgrade kernel-livepatch-6.18.20-20.229Upgrade python3-perf6.18Upgrade perf6.18-debuginfoUpgrade python3-perf6.18-debuginfoUpgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-headersUpgrade kernel6.18-debuginfoUpgrade bpftool6.18-debuginfoUpgrade kernel6.18-toolsUpgrade kernel6.18-debuginfo-common-aarch64 | May 4, 2026 | Mar 18, 2026 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Mar 18, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 22, 2026 | Mar 18, 2026 |
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