CVE-2026-23247

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.

The following products are affected by CVE-2026-23247 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-23247.

URL	Resource
https://git.kernel.org/stable/c/165573e41f2f66ef98940cf65f838b2cb575d9d1
https://git.kernel.org/stable/c/46e5b0d7cf55821527adea471ffe52a5afbd9caf
https://git.kernel.org/stable/c/eae2f14ab2efccdb7480fae7d42c4b0116ef8805
https://lore.kernel.org/linux-cve-announce/2026031818-CVE-2026-23247-07b3@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-23247
https://www.cve.org/CVERecord?id=CVE-2026-23247