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CVE-2022-32296The Linux kernel before 5.17.9 allows TCP servers to identify clients by observing what source ports are used. This occurs because of use…
- 3.3LowCVSS base score
- 0.44%Exploitation in 30 daysEPSS · top 61% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By mitre
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Low3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.44% · top 61% of all CVEs (12 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.3.
Affected products
n/a
- affected n/a
References
References8
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4c2c8f03a5ab7cb04ec64724d7d176d00bcc91e5 (opens in a new tab)x_refsource_MISCx_transferred
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.9 (opens in a new tab)x_refsource_MISCx_transferred
- [debian-lts-announce] 20220701 [SECURITY] [DLA 3065-1] linux security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- DSA-5173 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://arxiv.org/abs/2209.12993 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/0xkol/rfc6056-device-tracker (opens in a new tab)x_refsource_MISCx_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-419740.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-53489 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-32296)Record last updated .