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

mediumCVSS 4.1CVE-2026-80820

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.1
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80820

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-808200.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80820	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownCVE-2026-80820: In the Linux kernel, the following vulnerability has been resolved: xfs: don't livelock in scr…nvd

Recent advisories for xfs

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-80805: xfs: validate attr entry pointer before field accessmsrc · 2026-09-08
unknownCVE-2026-80820: In the Linux kernel, the following vulnerability has been resolved: xfs: don't livelock in scr…nvd · 2026-09-04
unknownCVE-2026-80805: In the Linux kernel, the following vulnerability has been resolved: xfs: validate attr entry p…nvd · 2026-09-04
unknownCVE-2026-80804: In the Linux kernel, the following vulnerability has been resolved: xfs: restore nofs context …nvd · 2026-09-04
highCVE-2026-80538: In the Linux kernel, the following vulnerability has been resolved: xfs: propagate errors from…nvd · 2026-08-26
highCVE-2026-80537: In the Linux kernel, the following vulnerability has been resolved: xfs: fix off-by-one in rtr…nvd · 2026-08-26