CVE-2026-23247
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-03-18
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
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.
Affected Software (17)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 28ee1b746f493b7c62347d714f58fbf4f70df4f0 < 025f532d8c5cfac77845e50daab7f478b360f2ac |
| Linux | Linux | 28ee1b746f493b7c62347d714f58fbf4f70df4f0 < e873e8c16b2fb743a381a9e59c108e63512301ec |
| Linux | Linux | 28ee1b746f493b7c62347d714f58fbf4f70df4f0 < 5da5662181ef8a251e3ba564903002c2e87de452 |
| Linux | Linux | 28ee1b746f493b7c62347d714f58fbf4f70df4f0 < eae2f14ab2efccdb7480fae7d42c4b0116ef8805 |
| Linux | Linux | 28ee1b746f493b7c62347d714f58fbf4f70df4f0 < 46e5b0d7cf55821527adea471ffe52a5afbd9caf |
| Linux | Linux | 28ee1b746f493b7c62347d714f58fbf4f70df4f0 < 165573e41f2f66ef98940cf65f838b2cb575d9d1 |
| Linux | Linux | 443fac9f2618b93cbc5ab068dc594530236b3a23 |
| Linux | Linux | 4.10.14 < 4.11 |
| Linux | Linux | 4.11 |
| linux | linux_kernel | 4.11 – 6.18.17 |
| linux | linux_kernel | 4.10.14 |
| linux | linux_kernel | 4.11 |
| linux | linux_kernel | 4.11 |
| linux | linux_kernel | 4.11 |
| linux | linux_kernel | 4.11 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |