CVE-2026-98980 Linux Kernel - Information Disclosure

Linux kernel contains a vulnerability in namei refwalk caused by revealing overmounted entries due to missing validation after unlink in refwalk, letting attackers read underlying entries during mountpoint unlink, exploit requires race condition with unlink and refwalk.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.21% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Information Disclosure
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
23 October 2026
Updated
25 October 2026

Vendor fix

Update to the latest Linux kernel version containing the patch for namei refwalk validation.

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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