{"id":"CVE-2022-32296","title":"The Linux kernel before 5.17.9 allows TCP servers to identify clients by observing what source ports are used","summary":"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.","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-330"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel < 5.17.9"],"patched":["linux_kernel 5.17.9"],"published":"2022-06-05","updated":"2026-10-14","sourceUpdated":"2026-10-14T17:17:40.420","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2022-32296","references":[{"url":"https://arxiv.org/abs/2209.12993","label":"cve@mitre.org"},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.9","label":"cve@mitre.org"},{"url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4c2c8f03a5ab7cb04ec64724d7d176d00bcc91e5","label":"cve@mitre.org"},{"url":"https://github.com/0xkol/rfc6056-device-tracker","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2022/dsa-5173","label":"cve@mitre.org"},{"url":"https://arxiv.org/abs/2209.12993","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.9","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4c2c8f03a5ab7cb04ec64724d7d176d00bcc91e5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/0xkol/rfc6056-device-tracker","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2022/dsa-5173","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-419740.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-794697.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00438,"epssPercentile":0.36482,"ingestedAt":"2026-10-14T17:44:53.598Z","slug":"CVE-2022-32296","body":"## Overview\n\nThe 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.\n\n## Affected\n\n- `linux_kernel < 5.17.9`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.17.9`","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}