CVE-2026-53048: gfs2: prevent NULL pointer dereference during unmount

mediumCVSS 5.5CVE-2026-53048

CSIRTS triage

Other

What: A NULL pointer dereference can occur during the unmount process in gfs2.
Who is affected: Deployments using the gfs2 filesystem.
Urgency: Remediation is medium urgency due to the medium severity rating, indicating a moderate risk.
Action: Apply the relevant patches for the gfs2 filesystem.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53048

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-2026-530480.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53048	coverage & exploitation status	NVD · CVE.org

Recent advisories for gfs2

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.

criticalCVE-2026-53049: gfs2: add some missing log lockingmsrc · 2026-06-09