PT-2026-26050 · Linux · Linux Kernel
Zhouyan Deng
·
Publicado
2026-01-01
·
Atualizado
2026-05-26
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CVE-2026-23247
CVSS v3.1
5.5
Média
| Vetor | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel addresses an issue where off-path TCP source port leakage could occur via a SYN cookie side-channel. The resolution involves reintroducing TCP ports into the timestamp offset randomization process, effectively reverting a previous change. This is achieved through a single siphash() computation to generate both an Initial Sequence Number (ISN) and a timestamp offset. The issue was reported by Zhouyan Deng.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use of Insufficiently Random Values
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Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
Linux Kernel