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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-23247

tcp: secure_seq: add back ports to TS offset

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Status
Published
Published
Updated
Assigning organization
Linux

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 28ee1b746f493b7c62347d714f58fbf4f70df4f0 to < 025f532d8c5cfac77845e50daab7f478b360f2acaffected
  • 28ee1b746f493b7c62347d714f58fbf4f70df4f0 to < e873e8c16b2fb743a381a9e59c108e63512301ecaffected
  • 28ee1b746f493b7c62347d714f58fbf4f70df4f0 to < 5da5662181ef8a251e3ba564903002c2e87de452affected
  • 28ee1b746f493b7c62347d714f58fbf4f70df4f0 to < eae2f14ab2efccdb7480fae7d42c4b0116ef8805affected
  • 28ee1b746f493b7c62347d714f58fbf4f70df4f0 to < 46e5b0d7cf55821527adea471ffe52a5afbd9cafaffected
  • 28ee1b746f493b7c62347d714f58fbf4f70df4f0 to < 165573e41f2f66ef98940cf65f838b2cb575d9d1affected
  • 443fac9f2618b93cbc5ab068dc594530236b3a23affected
  • 4.10.14 to < 4.11affected

Linux Linux

Default version status: affected

  • 4.11affected
  • 0 to < 4.11unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.94 to ≤ 6.12.*unaffected
  • 6.18.17 to ≤ 6.18.*unaffected
  • 6.19.7 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References