What’s Vulnerable › Vulnerabilities

CVE-2026-80820: xfs: don't livelock in scrub on a circular unlinked list

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-04 · updated 2026-09-04

Description

In the Linux kernel, the following vulnerability has been resolved: xfs: don't livelock in scrub on a circular unlinked list LOLLM points out that online fsck can livelock if an unlinked inode list contains a loop. Use a bitmap to detect cycles.

Affected products

• Linux kernel: 4.15 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/159d162fe80bd56573cafde5801bd5a90a3dd1ac
• https://git.kernel.org/stable/c/527eaaefddb6ec5c83a06c9a1559960dd6361753
• https://git.kernel.org/stable/c/56407a61a8bb85b884de802d39635abdb0ea7408
• https://git.kernel.org/stable/c/599453f83458b57995290a1d31200c263e2c2691

Get alerted when CVE-2026-80820 or the next vulnerability affects your stack