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Low 3.3Published Jun 5, 2022
CVE-2022-32296The Linux kernel before 5.17.9 allows TCP servers to identify clients by observing what source ports are used.
Updated under an hour ago ()
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It affects Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 3.3 LOW (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mitre
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | before 5.17.9 | NVD |
References
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4c2c8f03a5ab7cb04ec64724d7d176d00bcc91e5x-refsource-misc, mailing-list, patch, vendor-advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.9x-refsource-misc, release-notes, vendor-advisory
- https://lists.debian.org/debian-lts-announce/2022/07/msg00000.htmlmailing-list, x-refsource-mlist
- https://www.debian.org/security/2022/dsa-5173vendor-advisory, x-refsource-debian
- https://arxiv.org/abs/2209.12993x-refsource-misc
- https://github.com/0xkol/rfc6056-device-trackerx-refsource-misc
- https://cert-portal.siemens.com/productcert/html/ssa-419740.html
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.