The Linux kernel before 5.17.9 allows TCP servers to identify clients by observing what source ports are used.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · git.kernel.org
• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Jun 5, 2022 · NIST NVD

   Detected

   The Linux kernel before 5.17.9 allows TCP servers to identify clients by observing what source ports are used. This occurs because of use of Algorithm 4 ("Double-Hash Port Selection Algorithm") of RFC 6056.

2. Oct 14, 2026 · NIST NVD

   Updated

   The Linux kernel before 5.17.9 allows TCP servers to identify clients by observing what source ports are used. This occurs because of use of Algorithm 4 ("Double-Hash Port Selection Algorithm") of RFC 6056.

Affected

• cpe linux/linux kernelversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2022-32296

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2022-32296

  30-day exploitation probability 0.4%

  first.org
• NIST NVDVulnerability recordCVE-2022-32296

  The Linux kernel before 5.17.9 allows TCP servers to identify clients by observing what source ports are used. This occurs because of use of Algorithm 4 ("Double-Hash Port Selection Algorithm") of RFC 6056.

  nvd.nist.gov

References

• Reference · arxiv.org
• Release Notes · cdn.kernel.org
• Mailing List · git.kernel.org
• Reference · github.com
• Reference · lists.debian.org
• Reference · debian.org