CVE-2026-53284: btrfs: only release the dirty pages io tree after successful writes

highCVSS 7.5CVE-2026-53284

CSIRTS triage

Other

What: This vulnerability involves releasing dirty pages in the btrfs file system.
Who is affected: Deployments using the affected btrfs code.
Urgency: Remediation is high urgency due to the high severity rating.
Action: Apply the fix for CVE-2026-53284.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53284

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-2026-532840.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53284	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 btrfs

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-2026-53284: In the Linux kernel, the following vulnerability has been resolved: btrfs: only release the di…nvd · 2026-06-26
mediumCVE-2026-53122: btrfs: fix deadlock between reflink and transaction commit when using flushoncommitmsrc · 2026-06-09