CVE-2026-53063: dm cache: fix write hang in passthrough mode

highCVSS 7.1CVE-2026-53063

CSIRTS triage

Other

What: This vulnerability fixes a write hang in passthrough mode in dm cache.
Who is affected: Deployments using the affected dm cache functionality.
Urgency: Remediation is high urgency due to the high severity rating.
Action: Apply patches as soon as they are available.

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 7.1
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53063

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-2026-530630.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53063	coverage & exploitation status	NVD · CVE.org

Recent advisories for dm cache

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-2026-53265: dm cache policy smq: check allocation under invalidate lockmsrc · 2026-06-09
mediumCVE-2026-53060: dm cache metadata: fix memory leak on metadata abort retrymsrc · 2026-06-09
criticalCVE-2026-53062: dm cache policy smq: fix missing locks in invalidating cache blocksmsrc · 2026-06-09
mediumCVE-2026-53061: dm cache: fix dirty mapping checking in passthrough mode switchingmsrc · 2026-06-09
highCVE-2026-53064: dm cache: fix null-deref with concurrent writes in passthrough modemsrc · 2026-06-09