CVE-2019-18282: Debian Linux

Medium severity, CVSS 5.3. EPSS: 2.6% chance of exploitation in the next 30 days.

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 Debian Linux: version 8.0 only
• Linux Linux Kernel: from 4.3, up to and including 5.3.10
• Netapp 8300 Firmware: affected versions not specified
• Netapp 8700 Firmware: affected versions not specified
• Netapp a400 Firmware: affected versions not specified
• Netapp a700s Firmware: affected versions not specified
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Cloud Backup: affected versions not specified
• Netapp Data Availability Services: affected versions not specified
• Netapp E-Series Santricity OS Controller: from 11.0.0, up to and including 11.70.1
• Netapp h610s Firmware: affected versions not specified
• Netapp Hci Management Node: affected versions not specified
• Netapp Solidfire: affected versions not specified
• Netapp Steelstore Cloud Integrated Storage: affected versions not specified

Published 2020-01-16. Last modified 2026-06-17.