CVE-2026-80529: xfs: don't swallow dquot recovery verification errors

mediumCVSS 6.3CVE-2026-80529

CSIRTS triage

vendor: Linux product: Linux Kernel Denial of service

What: XFS filesystem silently ignores dquot recovery verification errors instead of failing safely.
Who is affected: Systems using XFS filesystem with disk quotas enabled on affected kernel versions.
Urgency: Medium-high priority; data integrity risk with CVSS 6.3, not currently exploited.
Action: Apply kernel patch or upgrade to fixed version.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Linux Kernel

Get an email when a new Linux Kernel advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.3
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80529

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-2026-805290.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80529	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

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.

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
highCVE-2026-80536: In the Linux kernel, the following vulnerability has been resolved: xfs: bounds-check buffer l…nvd · 2026-08-26
unknownCVE-2026-80535: In the Linux kernel, the following vulnerability has been resolved: xfs: don't double-lock whe…nvd · 2026-08-26
unknownCVE-2026-80534: In the Linux kernel, the following vulnerability has been resolved: xfs: fix ilock leak on err…nvd · 2026-08-26
unknownCVE-2026-80533: In the Linux kernel, the following vulnerability has been resolved: xfs: don't walk off the en…nvd · 2026-08-26