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Vulnerability record · CVE-2019-5108 · published 23 December 2019

CVE-2019-5108: Linux kernel improper authentication vulnerability

Linux · Linux Kernel

An exploitable denial-of-service vulnerability exists in the Linux kernel prior to mainline 5.3. An attacker could exploit this vulnerability by triggering AP to send IAPP location updates for stations before the required authentication process has completed. This could lead to different denial-of-service scenarios, either by causing CAM table attacks, or by leading to traffic flapping if faking already existing clients in other nearby APs of the same wireless infrastructure. An attacker can forge Authentication and Association Request packets to trigger this vulnerability.

6.5 CVSS 3.1 Medium EPSS 10% · top 4.5% CWE-440 · CWE-440CWE-287 · Improper authentication
6.5CVSS 3.1 base score, v2 3.3
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
16Affected product versions listed by NVD
28References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An exploitable denial-of-service vulnerability exists in the Linux kernel prior to mainline 5.3. An attacker could exploit this vulnerability by triggering AP to send IAPP location updates for stations before the required authentication process has completed. This could lead to different denial-of-service scenarios, either by causing CAM table attacks, or by leading to traffic flapping if faking already existing clients in other nearby APs of the same wireless infrastructure. An attacker can forge Authentication and Association Request packets to trigger this vulnerability.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

16 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/156455/Kernel-Live-Patch-Security-Notice-LSN-0063-1.html Third Party AdvisoryVDB Entry
https://git.kernel.org/linus/3e493173b7841259a08c5c8e5cbe90adb349da7e Mailing ListPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20200204-0002/ Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0900 ExploitThird Party Advisory
https://usn.ubuntu.com/4285-1/ Third Party Advisory
https://usn.ubuntu.com/4286-1/ Third Party Advisory
https://usn.ubuntu.com/4286-2/ Third Party Advisory
https://usn.ubuntu.com/4287-1/ Third Party Advisory
https://usn.ubuntu.com/4287-2/ Third Party Advisory
https://www.debian.org/security/2020/dsa-4698 Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html PatchThird Party Advisory
http://packetstormsecurity.com/files/156455/Kernel-Live-Patch-Security-Notice-LSN-0063-1.html Third Party AdvisoryVDB Entry
https://git.kernel.org/linus/3e493173b7841259a08c5c8e5cbe90adb349da7e Mailing ListPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20200204-0002/ Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0900 ExploitThird Party Advisory
https://usn.ubuntu.com/4285-1/ Third Party Advisory
https://usn.ubuntu.com/4286-1/ Third Party Advisory
https://usn.ubuntu.com/4286-2/ Third Party Advisory
https://usn.ubuntu.com/4287-1/ Third Party Advisory
https://usn.ubuntu.com/4287-2/ Third Party Advisory
https://www.debian.org/security/2020/dsa-4698 Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html PatchThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-5108), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.