VULNERABILITY INTELLIGENCE
CVE-2018-5391
CVSS score7.5 HIGH
EPSS probability32.45%
CISA KEVNot currently listed
Published2018-09-06
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size.
Weakness classification
- CWE-20: Improper Input Validation
- CWE-400: Uncontrolled Resource Consumption
Primary references
- cret@cert.org — Third Party Advisory
- cret@cert.org — Broken Link
- cret@cert.org — Mailing List, Third Party Advisory
- cret@cert.org — Mailing List, Third Party Advisory
- cret@cert.org — Mailing List, Third Party Advisory
- cret@cert.org — Third Party Advisory, VDB Entry
- cret@cert.org — Third Party Advisory, VDB Entry
- cret@cert.org — Third Party Advisory, VDB Entry
- cret@cert.org — Third Party Advisory
- cret@cert.org — Third Party Advisory
- cret@cert.org — Third Party Advisory
- cret@cert.org — Third Party Advisory