VDB
DEBIAN-CVE-2026-23247
DEBIAN-CVE-2026-23247
PUBLISHED
CVSS 9.300000190734863 CRITICAL
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.
Risk Scores
CVSS 4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | linux | 6.16.12-2, 6.13.6-1~exp1, 6.13.7-1~exp1 |
| Debian:14 | linux | 6.17.13-1, 6.17.13-1, 6.17.2-1 |
| Debian:12 | linux | 6.17.10-1, 6.17.11-1, 6.17.12-1 |
| Debian:11 | linux | 5.10.103-1, 0, 5.10.103-1~bpo10+1 |
Timeline
- Mar 18, 2026 CVE Published
- Apr 28, 2026 CVE Updated