What’s Vulnerable › Vulnerabilities
CVE-2019-18282
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-01-16 · updated 2026-06-17
- Weakness: CWE-330
Description
The flow_dissector feature in the Linux kernel 4.3 through 5.x before 5.3.10 has a device tracking vulnerability, aka CID-55667441c84f. This occurs because the auto flowlabel of a UDP IPv6 packet relies on a 32-bit hashrnd value as a secret, and because jhash (instead of siphash) is used. The hashrnd value remains the same starting from boot time, and can be inferred by an attacker. This affects net/core/flow_dissector.c and related code.
Affected products
- Debian Linux: 8.0
- Linux kernel: from 4.3 through 5.3.10
- NetApp 8300 Firmware: all versions
- NetApp 8700 Firmware: all versions
- NetApp A400 Firmware: all versions
- NetApp A700S Firmware: all versions
- Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
- NetApp Cloud Backup: all versions
- NetApp Data Availability Services: all versions
- E-Series SANtricity OS Controller Software 11.x: from 11.0.0 through 11.70.1
- NetApp H610S Firmware: all versions
- NetApp Hci Management Node: all versions
- NetApp Solidfire: all versions
- NetApp Steelstore Cloud Integrated Storage: all versions
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.10
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=55667441c84fa5e0911a0aac44fb059c15ba6da2
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
- https://security.netapp.com/advisory/ntap-20200204-0002/
- https://www.computer.org/csdl/proceedings-article/sp/2020/349700b594/1j2LgrHDR2o
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.10
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=55667441c84fa5e0911a0aac44fb059c15ba6da2
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
- https://security.netapp.com/advisory/ntap-20200204-0002/
- https://www.computer.org/csdl/proceedings-article/sp/2020/349700b594/1j2LgrHDR2o
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