CVE-2026-98073 Linux Kernel - Denial of Service

Linux kernel contains a vulnerability in __dev_change_net_namespace() caused by conflicting altnames for devices in dying network namespaces, letting attackers cause kernel warnings or instability, exploit requires creating devices with same altname in different net namespaces.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.16% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
25 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for conflicting altnames in __dev_change_net_namespace().

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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